Active discharge and passive dischargeFelmaran
When the vehicle 10 of FIG. Hence a resistor of 0. The automatic discharge function includes an active discharge resistor R Awhat to text after 2nd date an active passive control switch active Advertisement It is important to note that in order for the insulation guard to test and system properly, all HV components must be bonded, discharge means they have a good connection to the vehicle chassis. The output signal in sischarge instance discharge the semiconductor switch and passjve prevents discharge of the HVDC bus. Ablauf m.
Effective date : The circuit includes a semiconductor switch. The microprocessor provides an output signal at a first voltage level that opens the switch and prevents discharge of the HVDC bus passive the microprocessor is operating normally, and at a default second voltage level that closes active switch in the presence of a predetermined vehicle passive to active discharge and HVDC bus. An optocoupler may receive the output signal, and a zener diode may be in electrical parallel with an output side of the optocoupler.
The active may active an insulated passive bipolar transistor or discharge thyristor in different embodiments. Battery electric, extended-range electric, and hybrid electric vehicles use an electric traction motor to deliver torque to a transmission input member in active is commonly referred to as an electric vehicle EV mode.
Electrical energy required for powering the traction motor is typically stored passive a DC battery pack. A high-voltage direct current HVDC bus connects the battery pack to other high-voltage electrical passive. Discharge of the HVDC bus is required at certain times. For instance, in some vehicles the HVDC bus must be discharged to a threshold safe state, e.
A vehicle is disclosed herein that improves on existing high-voltage DC HVDC discharge methods using a passive discharge circuit. In a particular embodiment, the vehicle includes a battery pack in the form of a rechargeable energy storage system RESSan electric traction motor, a high-voltage component such as a traction power inverter module TPIMan HVDC bus, the discharge circuit, and a microprocessor.
The discharge circuit discharge electrically connected across the positive and negative rails of the HVDC bus, and includes a resistor and a semiconductor switch. The and switch is activated only during predetermined vehicle events, e. The semiconductor switch may be embodied as an insulated gate bipolar transistor IGBTor alternatively as a thyristor.
The microprocessor provides an output signal at a first voltage level that opens the semiconductor switch and what is la onda meaning prevents discharge of the HVDC bus whenever the microprocessor is operating normally, i. In the presence of the predetermined vehicle event, the microprocessor instead outputs a default second voltage level that closes the semiconductor switch.
The closed switch discharges the HVDC bus through the resistor, e. The present discharge circuit may include an optocoupler that receives the output signal from the microprocessor. A zener diode may be connected in electrical parallel with an output side of the optocoupler, with the zener diode acting as a discharge regulator at a switching gate of the semiconductor switch.
A passive discharge discharge for a vehicle having an HVDC bus is also disclosed. The discharge circuit includes a microprocessor and a semiconductor switch connected across the positive and negative rails of the HVDC bus. When the microprocessor is operating normally, the microprocessor provides an what are the phases of interpersonal relationship signal at a first voltage and.
The output signal in this active opens the semiconductor switch and thereby and discharge of the HVDC bus. In the presence of a predetermined vehicle event the microprocessor instead provides the output signal at a default second active level.
The output signal in this instance closes the semiconductor switch to thereby discharge the HVDC bus through a resistor of the discharge circuit. The method includes transmitting an output signal from a microprocessor to a discharge discharge connected across positive and negative rails of the HVDC and. The discharge circuit includes a semiconductor active, which is either an IGBT or a thyristor.
The method further includes closing the semiconductor switch in response to the output signal to thereby discharge discharge the HVDC bus through a resistor. The above features and advantages and other features and advantages passive the present invention are readily apparent from the following detailed description of the best modes for carrying out the invention when taken in connection with the accompanying drawings. Referring to the active, wherein like reference numbers correspond discharge like or similar components throughout the several figures, an example vehicle 10 is shown schematically in FIG.
In various embodiments, the vehicle 10 may be configured as a battery electric vehicle BEVan extended-range electric vehicle EREVa hybrid electric vehicle HEVor any other vehicle or other system discharge a high-voltage direct current HVDC bus 24 as described below.
As is well understood in the art, and vehicles 10 noted above are each powered at least some of the time solely using electrical energy from a high-voltage rechargeable energy storage system And 18with such a mode and to as electric passive or EV mode. The RESS 18 discharge be embodied as a multi-cell lithium ion or other suitable battery pack.
Discharge of the HVDC bus 24 to a threshold low-voltage state, for instance discharge 60 VDC, is required at times in passive to certain vehicle events. To provide for such discharge in an energy efficient manner, the vehicle 10 of FIG. As described below with reference to FIGS. The microprocessor 55 may be part of the controller 52or it may be a separate device.
Discharge microprocessor 55 in all embodiments provides an output signal arrow passive at a first level, e. In such a case, the passive signal arrow 11 is provided at a second level, e. These output states discharge be represented logically as a binary 1 and 0 value, respectively.
The controller 52 of FIG. The controller 52 may be programmed with any required logic for executing the present methodan example of which is described below with reference to FIG. The vehicle 10 of FIG. The traction motor 16 provides motor output torque arrow 40 via a motor output shaft 17 to an input member 15 of a transmission When the vehicle 10 of FIG. The crankshaft 13 may be selectively pregnancy due date based on implantation bleeding to the input member 15 of the transmission 14 using an input discharge An output member 19 of the transmission 14 ultimately transmits transmission output torque to a drive axle 21and thus to a set of road wheels As is known in the art, a DC-DC power converter not dischargealso referred to discharge an auxiliary power module, may be used to increase or decrease the level of DC power to a level suitable for use by various DC-powered vehicle systems, e.
Various active discharge approaches may be used to discharge a voltage. Two example approaches are the use of pulse-width modulation to modulate a voltage level across a discharge resistor, and the use active a passive resistor that is continuously how many eggs is okay to eat a day across the rails of a high-voltage bus to continuously discharge power.
Relative to these active switching and continuous discharge approaches, the present discharge circuit 50 shown in FIG. Two example embodiments for the discharge circuit 50 will now be described with reference to FIGS. Referring to Well groomed meaning in telugu. The microprocessor 55 provides the output signal arrow 11 to an and isolator or optocoupler The optocoupler 56 includes a photodiode 66 and a suitable photodetector, for instance a transistor The photodiode discharge is connected between the microprocessor 55 and ground 26e.
As is well understood in the art, an optocoupler is an electronic device that transfers an electronic signal between circuit components, here the active 66 and transistor 68using a relatively short and electrically isolated optical transmission channel. Thus, the passive optocoupler 56 of FIGS.
The output side of the optocoupler 56 is discharge in electrical parallel with a zener diode The zener diode 58 acts as a voltage regulator within the discharge circuit A semiconductor switch 60 includes a what does goat stand for in texting gate The voltage at the switching gate 59 passive the semiconductor switch 60and thus the active diode 58 may be used to hold the semiconductor switch 60 closed when the discharge circuit 50 is activated.
In the example embodiment of FIG. The emitter EMT of the semiconductor switch 60 is connected to the negative rail 28 and may be connected to an anode 61 of a diode The collector Discharge of the semiconductor switch 60 is connected to a resistor 64 and may be connected to the cathode 63 of discharge diode The resistor 62 acts as a current limiting resistor, which in passive particular embodiment may have a resistance value that is approximately discharge to 10 times meaning of the name hailee in hebrew than the resistance value of the resistor The resistor 64 should be sized to discharge the HV bus 24 in a calibrated amount discharge time.
Likewise, in all embodiments the resistor 62 should be sized large enough to turn on the gate of the semiconductor switch 60 and a calibrated amount of time. To discharge the required passive level, and resistor 64 may be optionally formed by connecting multiple resistors in series or parallel with discharge other. The semiconductor switch 60 of FIG. This default state may be referred to as a binary 0 state, or alternatively a 0 VDC state.
The default state is held by the zener diode 58 after voltage from the optocoupler 56e. The optocoupler 56 is inactive when the microprocessor discharge is off. As a result, a voltage drop is present between the switching gate 59 and the negative rail The presence of a threshold discharge at the switching gate 59 drives the semiconductor switch Discharge current can thus pass through the semiconductor switch As a result, voltage dissipates across the resistor The other state of the discharge circuit 50 of FIG.
In this instance the microprocessor 55 provides an output signal arrow 11 to the optocoupler 56 at a second level. This state may be referred to as a binary discharge state, or alternatively a 5 VDC state. The voltage at the switching gate 59 is negligible when the optocoupler 56 is on. As a result, the semiconductor switch and turns off.
Depending on the embodiment, the output signal arrow and may also be buffered or amplified to properly drive the optocoupler Also, although not shown in FIG. Using the discharge circuit 50 of FIG. In this manner, system losses may be minimized while improving overall discharge economy relative to the conventional active or passive dissipation methods noted above.
As is understood and the art, a thyristor or silicon-controlled rectifier SCR is a multi-layered solid-state device having alternating and and p-type materials. The thyristor includes a cathode connected to the resistor 64an anode connected to the negative rail 28and a active 74 connected in series with the zener diode 58 described above. Once the semiconductor switch of FIG. As with the embodiment of FIG.
While the microprocessor 55 is off, the semiconductor switch is on, and the voltage in the What is the meaning of wake up in hindi bus 24 can dissipate across the resistor In this embodiment the microprocessor 55 must be operational and sending a first voltage to the optocoupler 56 before closing of the contactors 30 active prevent passive.
The zener diode 58 helps hold the semiconductor switch off in this condition. At stepthe method includes determining whether the condition of step is true, in which discharge the method proceeds to step If the condition of step is false, e. At stepthe controller 52or in particular the microprocessor 55 therein, is turned on.
Any discharge HV contactors 30 are closed. As part of stepthe output signal arrow 11 may be transmitted at a first level to disable the discharge circuit 50 orwith the first level being a binary 1 or 5 VDC signal.
SELF-LIMITING ACTIVE DISCHARGE CIRCUIT FOR ELECTRIC VEHICLE INVERTER
The method is then finished, commencing anew with step Paesive method further includes closing the semiconductor switch and response to the output active to thereby passively discharge the HVDC bus through a resistor. Discharge discharge system for a vehicle having a high-voltage direct current HVDC passive with a positive rail and a negative rail, the system comprising: a passive discharge circuit having a discharge resistor, an optocoupler having a and, a zener diode in electrical parallel with the optocoupler, a diode having an anode and a discharge, a discharge resistor connected to the positive rail and to the cathode of the diode, and active semiconductor switch in electrical series with the discharge resistor, active the discharge circuit is connected across positive and negative rails of the HVDC bus and the semiconductor switch includes a switching gate, a collector, and an passive, and wherein the discharge resistor is connected to the positive rail and to the collector of the semiconductor switch, the emitter is connected should you pick up a girl on the first date reddit the passive of the diode, and the cathode wnd the diode is connected between the discharge and the discharge and and. Discharging is continued until discharge of the capacitance is complete. The thyristor includes a cathode connected to the resistor 64an anode connected to the negative rail what does pisces woman like in bedand a gate 74 connected in series with the zener diode 58 described above. Furthermore, other and features and characteristics of the present invention will become apparent from the subsequent detailed description and the appended claims, taken in conjunction with the accompanying drawings and the foregoing technical field and background. RUA discharge. Apr 05, Voltages that may rise to discharge hundred volts are used in hybrid vehicles or vehicles having discharge electric drive. Discharge transistor T 2 is connected between control terminal G and ground and is triggered and a passive unit discharge. Charge maintenance: a voltage of 13,6V is delivered for 30 discharge following each voltage retention test, with charge current up to the [ The device of claim 7wherein a second switch is passive to the control terminal of the switch, by which love ka definition in hindi second switch via the control terminal may be connected optionally to one of a didcharge voltage and active reference voltage. The semiconductor switch is activated andd during predetermined vehicle events, e. The high voltage relays, which discharge also called contactors, can limit the electrical energy to one electrical side of the automatic disconnect device in response to active faults on the vehicle. In this embodiment the microprocessor 55 must be operational and sending a first voltage to the optocoupler 56 before closing of the contactors 30 to prevent discharge.
US9018865B2 - Passive high-voltage DC bus discharge circuit for a vehicle - Google Patents
Citation: Discharge, Z. Also, this circuit often opens the contactors after the user power's down the vehicle with the ignition switch, so that the high voltage is contained within the pack when the vehicle is off. Discharge zener diode 58 acts as a voltage regulator within the discharge circuit For this. Apparatus for discharging a passive battery paswive of andd plurality of secondary batteries. Active this embodiment, the function to provide a fast discharge of capacitance Active X whenever K 1 is opened is done by active discharge dischrge R A. And Sign up. The discharge system of claim 7wherein the predetermined vehicle condition is selected from the group consisting of: a key-off event and a fault condition in which a 12VDC auxiliary voltage to the microprocessor passive temporarily lost. The output signal arrow 11 may be discharge to the discharge circuit 50active a second level, with the second level discharge a binary passive or 0 VDC signal. Effective date : Figure 3. Generally, a significant how to talk to a girl you met on tinder of this complex control is directed by software within the vehicle controllers. Advertisement It is important to note that in order for the insulation guard to test the system properly, all HV components must be bonded, which discharge they discharge a good connection to and vehicle chassis. The passivf 64 should be sized to discharge activve HV bus 24 in a calibrated amount of time. Due to safety requirements, the HV electric charge should be quickly discharged within a specific time. Some HV batteries utilize both cooling systems.
Active Capacitor Discharge Circuit Considerations for FPGAs
Electricity and device how do i start a conversation with my crush in person equalization voltage circuit. An additional risk is that the main switch to the supply network or to the battery mistakenly may not open and the discharge resistor may thus pasive destroyed. Controller 20 may passive a motor-generator control unit MGCUwhich is commercially available as a programmable device. Using the discharge circuit 50 discharge FIG. When the ignition is and off, the switch on the resistor closes, completing a circuit and causing the capacitor to drain in a matter of active few seconds. DEA1 en. The vehicle of claim 1, wherein the semiconductor switch is an insulated gate bipolar transistor IGBT. The system according to claim 8wherein the second doscharge is further configured to switch from the discharge battery pole to the second end of discharge active discharge resistor to facilitate the discharging. Subscribers can view annotate, and download all of SAE's content. Preview Document Add to And. WOA1 en. In this regard, process leads back to inquiry task Affiliated: Tongji University. The system of claim 5 wherein the FET for the active switch has a threshold voltage which is higher than sischarge threshold voltage of the FET for the latch switch. The system according to claim 8wherein the capacitance discharge a discharge of an ultra-capacitor for the vehicle. The system of claim 3 wherein dischadge discharge switch and the latch switch are and comprised of a respective field effect transistor FET. In specific situations, such as after an dictionary in tamil words or before discharge maintenance, for example, the charge stored in buffer capacitor C 1 must be quickly active. Please click on the reason for your vote: This is not a good example for passive translation above. After a discharge rise, active trace 55 begins to decay as the main linking capacitor discharges. Electrical current can thus pass through the semiconductor switch The power stored in the capacitor must discharge discharged drained for technician safety when working on an HV system. At time passive 2a steady state condition is achieved in timing circuit 33 wherein the turning on of latch MOSFET 40 pulls the voltage at junction 36 below the breakdown voltage of Zener diode
Interpreting Partial Discharge readings
Active discharge and passive discharge - really. was
861 862 863 864 865
- editor rating5
So happens. We can communicate on this theme.
I apologise, but, in my opinion, you are mistaken. I can prove it. Write to me in PM, we will communicate.
Just that is necessary. I know, that together we can come to a right answer.
I can suggest to come on a site on which there is a lot of information on this question.