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Lecture Power Electronics Forum > Power Management
17:20-17:40 h | Virtual
Transistor switching losses inside an EV Inverter fundamentally affect both the inverter efficiency and the motor drive efficiency -and hence EV range. Optimum EV motor efficiency is achieved with a pure sine wave output from the inverter. Unfortunately, due to transistor switching losses, the faster switching frequencies needed to achieve the pure sine wave output actually reduce inverter efficiencies. Pre-Switch’s embedded AI virtually eliminates switching losses thus solving both efficiency challenges. Inverter efficiencies are improved despite using 10X higher switching frequencies. The new higher switching frequencies reduce sine wave distortion and improve motor efficiency. Further, the reduction of switching losses also reduces the size and cost of the SiC transistors in the inverter. Best of all, EV range is increases – by a substantial 5-12%. Using real data obtained from Pre-Switch’s CleanWave 200kVA inverter reference, this discussion will show how system level inverter efficiencies of over 99% can be achieved with a switching frequency of 100kHz.
Subjects: Power Electronics
Speaker: Bruce Renouard (Pre-Switch)
Type: Lecture
Speech: English
Transistor switching losses inside an EV Inverter fundamentally affect both the inverter efficiency and the motor drive efficiency -and hence EV range. Optimum EV motor efficiency is achieved with a pure sine wave output from the inverter. Unfortunately, due to transistor switching losses, the faster switching frequencies needed to achieve the pure sine wave output actually reduce inverter efficiencies. Pre-Switch’s embedded AI virtually eliminates switching losses thus solving both efficiency challenges. Inverter efficiencies are improved despite using 10X higher switching frequencies. The new higher switching frequencies reduce sine wave distortion and improve motor efficiency. Further, the reduction of switching losses also reduces the size and cost of the SiC transistors in the inverter. Best of all, EV range is increases – by a substantial 5-12%. Using real data obtained from Pre-Switch’s CleanWave 200kVA inverter reference, this discussion will show how system level inverter efficiencies of over 99% can be achieved with a switching frequency of 100kHz.
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Speaker,
Pre-Switch