A novel space vector modulation‐based transistor‐clamped H bridge inverter‐fed permanent magnet synchronous motor drive for electric vehicle applications

Abstract

Summary Electric vehicles (EVs) require an extremely efficient power train unit consisting of converters with very low power losses and a motor with excellent controllability, long life, and an extended speed range. Consequently, permanent magnet synchronous motor (PMSM) drives are increasingly becoming popular for EV applications due to their higher torque density, better efficiency, and rugged structure. This paper explores the reduced switch five‐level transistor—clamped H bridge (TCHB) inverter topology for driving a PMSM, particularly for an EV application. The TCHB inverter emulates the modular structure of a cascaded H bridge (CHB) inverter, with each phase being energized by independent DC sources, thereby making it a natural fit for EVs. Simplified loss models have been developed to estimate the conduction and switching losses in the TCHB and CHB inverter circuits to assess their suitability for EV applications. An experimental prototype of the TCHB inverter, triggered with a novel space vector‐based modulation scheme, feeding a vector‐controlled PMSM has been designed, developed, and tested to ascertain the efficacy of this inverter‐motor electrical drive system for light‐duty EV applications, with regard to reduced losses, better DC bus utilization, diminished torque ripples, and improved dynamic response.

Power quality assessment of novel multilevel and multistring inverters for electric vehicle applications

“…It infers that the power quality is better with the proposed new multistring inverter possessing minimized THD value of 11.97% and 17.43% for 5-level and 7-level outputs respectively. Table 2 [18] 35.09 32.17 Distribute auxiliary inverter [19] 34.50 31.66 Multilevel DC/AC traction inverter [20] 34.28 30.73 Traction inverter with silicon carbide (SiC) module [21] 31.03 29.96 Inverter system [22] 30.62 28.77 Modified class E inverter [23] 29.80 28.45 Traction inverter [9] 27.63 25.89 250 kW silicon carbide MOSFET based three-level traction inverter [24] 28.91 27.48 Space vector modulation based transistor clamped H-bridge inverter [25] 26…”

Multilevel Inverter fed Direct Torque and Flux Control‐Space Vector Modulation of Speed Sensorless Permanent Magnet Synchronous Motor drive with Improved Steady State and Dynamic Characteristics

“…In SVM, the reference voltage vector is realized using nearby three voltage vectors in a space vector diagram. 29 The five-level diode clamped inverter 4 circuit diagram is shown in Figure 3. The five-level diode clamped inverter consist of 24 power semiconductor switches, four capacitors and clamping diodes.…”

“…The schematic diagram of proposed five‐level diode clamped inverter fed DTFC‐SVM of MRAS‐based speed sensorless PMSM drive is shown in Figure 1. It consists of a five‐level diode clamped inverter for which switching gate pulses are supplied by a five‐level SVM switching technique, 29 and it is designed based on two‐level SVM. The SVM‐based MLIs are used to enhance the system performance by providing a more number of voltage vectors to realize the reference voltage vector in space vector diagram such that, it gives less ripple content in torque and flux 15,16,18 .…”

“…The SVM technique provides good steady state and dynamic performance of PMSM drive under various operating conditions. In SVM, the reference voltage vector is realized using nearby three voltage vectors in a space vector diagram 29 . The five‐level diode clamped inverter 4 circuit diagram is shown in Figure 3.…”

Air‐gap flux‐oriented vector control of dual stator induction generator used in wind energy conversion system with novel 13‐zone time optimized space vector‐based hybrid bus clamping PWM

“…Since PWM is one of the most popularly used PWM technique compared to SPWM other continuous PWM techniques like third harmonic injection (THI-PWM) and conventional space vector PWM(CSVPWM) have higher line voltage utilization capability. 22 Discontinuous BUS clamping PWM sequences offer same DC bus utilization factor as that of CSVPWM and comparably reduced line voltage harmonic accompanied with minimized switching energy loss and reduced torque pulsation at the motor generating end at the higher modulation index in linear modulation range (up to 0.866 MI). 23 Hybrid combination of CSVPWM along with different bus clamping PWM sequences proposed in the literature has shown further reduction in line current ripple, pulsating torque, and switching energy loss.…”