Analysis of sine‐triangle and zero‐sequence injection modulation schemes for split‐phase induction motor drive

Abstract

A split-phase induction motor is fed from two three-phase voltage source inverters for speed control. This study analyses carrier-comparison based pulse width modulation (PWM) schemes for a split-phase motor drive, from a spacevector perspective. Sine-triangle PWM, one zero-sequence injection PWM where the same zero-sequence signal is used for both the inverters, and another zero-sequence injection PWM where different zero-sequence signals are employed for the two inverters are considered. The set of voltage vectors applied, the sequence in which the voltage vectors are applied, and the resulting current ripple vector are analysed for all the PWM methods. Besides all the PWM methods are compared in terms of dc bus utilisation. For the same three-phase sine reference, the PWM method with different zero-sequence signals for the two inverters is found to employ a set of vectors different from the other methods. Both analysis and experimental results show that this method results in lower total harmonic distortion and higher dc bus utilisation than the other two PWM methods.

Advances in Dual-Three-Phase Permanent Magnet Synchronous Machines and Control Techniques

“…is the method is implemented by injecting a zero-sequence component into the reference voltage in each three-phase set. A common zero-sequence signal is added to two sets of three-phase sinusoidal signals, designated as single-zero-sequence injection PWM (SZIPWM) [121,122]. Correspondingly, two different zero-sequence signals for the two sets of sinusoidal signals are employed, designated as double-zero-sequence injection PWM (DZIPWM) [56,123,124].…”

Linear PWM Techniques of Asymmetrical Six-Phase Machine With Optimal Current Ripple Performance

“…These techniques are termed as two-inverter based technique (TINV) in [12]. Existing TINV techniques are-a) Sinetriangle PWM (STPWM), [13], where zero common-mode voltage is injected between load-neutral and DC-bus midpoint; b) Double zero-sequence injection PWM (DZIPWM), which is also named as ZS3PWM in [13], where two different zero-sequence signals are used for two 3φ inverters and the modulation signals of both inverters are compared with same carrier signal; these zero-sequence signals are half of the middle values of the corresponding 3φ modulation signals, c) ZS6PWM, [13], where a single common-mode signal is used for both Inverter-1 and Inverter-2 and this is equal to the half of negative summation of maximum and minimum of 6φ modulating waves. These three TINV techniques follow rules R1 and R2.…”

“…These three TINV techniques follow rules R1 and R2. The comparison of current ripple performances as function of M I of these TINV techniques and SVPWM techniques reveals that SVPWM techniques are much better than TINV techniques for the feasible range of γ, [6], [13], [14].…”

A new switching sequences of SVPWM for six-phase induction motor with features of reduced switching losses

“…The double zero sequence injection method using harmonic distortion factor (HDF) as a performance parameter, is investigated in [15]. A detailed study of carrier-based PWM sequences using a space vector approach is presented in [16], [17]. The comparison of carrier based PWM techniques along with 24-sector based PWM technique is discussed in [17].…”