External discharge DC inverter

Do EV traction inverters need a DC link active discharge?

Every EV traction inverter requires a DC link active discharge as a safety-critical function. The discharge circuit is required to discharge the energy in the DC link capacitor under the following conditions and requirements: Power transistor on, off control using the TPSI3050-Q1.

Do automotive inverters need active discharge?

This paper first analyzes the necessity of active discharge in automotive inverters and then introduces the commonly used discharge methods. After reviewing the pros and cons of the current methods, a new discharge solution using IGBT (Insulated Gate Bipolar Transistor) modules WSC (Weak Short Circuit) is proposed.

How do EV traction inverters work?

To control the voltage so that the voltage does not exceed 50 V (touch safe), the auxiliary power supply has to turn on and power up safety-relevant circuits that can discharge the DC link caps (active discharge) or actively short circuit the motor. Every EV traction inverter requires a DC link active discharge as a safety-critical function.

Can a DC link capacitor be discharged fast?

The simulation and experimental results show that this method can not only discharge the DC link capacitor fast, but also has no risk of IGBT damaging since the IGBT electric and thermal stresses are in the safe operation range during the discharge time.

How is power dissipated in an inverter?

The power dissipated by the the inverter’s housi ng or through a cooling s ystem. the current. The discharge energy is used to charge the Low- voltage battery (12 V) us ed as an auxiliary bat tery. the Flyback transformer. A charging current of 1C is used to Ampere ho urs (Ah). The blue trace i n Fig.1 illustrates the energy

Is a hybrid discharge strategy suitable for EV drives?

In order to eliminate the disadvantages and synthesize the advantages of the traditional machine winding-based and external bleeder-based discharge techniques, this paper proposes a hybrid discharge strategy which can achieve five-second discharge in minimum sacrifice of the bleeder size and weight for any EV drives.