PRACTICAL REAL-TIME PWM MODULATORS - AN ASSESSMENT

被引:37
作者
HANDLEY, PG [1 ]
BOYS, JT [1 ]
机构
[1] UNIV AUCKLAND,DEPT ELECT & ELECTR ENGN,AUCKLAND,NEW ZEALAND
来源
IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS | 1992年 / 139卷 / 02期
关键词
PULSE-CODE MODULATION; INDUCTION MOTORS;
D O I
10.1049/ip-b.1992.0013
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Many techniques have been proposed for generating PWM waveforms for controlling AC motor drives. This paper demonstrates the practicality of generating real-time, software-based PWM waveforms using low-cost microprocessors. It uses a space vector methodology and extends the concept of a computationally efficient trapezoidal modulation strategy to more desirable sinusoidal schemes. Within the algorithm, the apportioning of null (zero) voltage vector times (during which all three output phases are equal) is identified as a degree of freedom which can be used to optimise the resultant PWM waveform. The optimisation criterion chosen here was that of minimum motor harmonic losses. The traditional space vector modulation technique, which divides the null voltage vector times equally between the two possible null states, is shown to surpass both the triangulation and the bus-clamping generation strategies when evaluated in terms of both this criterion and other practical factors.
引用
收藏
页码:96 / 102
页数:7
相关论文
共 21 条
[1]  
BONINO M, 1990, 6TH P C POW EL MOT C, V90, P618
[2]   A HIGH-PERFORMANCE PULSEWIDTH MODULATOR FOR AN INVERTER-FED DRIVE SYSTEM USING A MICROCOMPUTER [J].
BOSE, BK ;
SUTHERLAND, HA .
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 1983, 19 (02) :235-243
[3]   SUBOPTIMAL SWITCHING STRATEGIES FOR MICROPROCESSOR-CONTROLLED PWM INVERTER DRIVES [J].
BOWES, SR ;
MIDOUN, A .
IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, 1985, 132 (03) :133-148
[4]   MICROPROCESSOR CONTROL OF PWM INVERTERS [J].
BOWES, SR ;
MOUNT, MJ .
IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, 1981, 128 (06) :293-305
[5]   HARMONIC-ANALYSIS OF SPACE VECTOR MODULATED PWM WAVE-FORMS [J].
BOYS, JT ;
HANDLEY, PG .
IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, 1990, 137 (04) :197-204
[6]   A LOSS MINIMIZED SINUSOIDAL PWM INVERTER [J].
BOYS, JT ;
WALTON, SJ .
IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, 1985, 132 (05) :260-268
[7]  
BOYS JT, 1992, IN PRESS IEE P B
[8]   TECHNIQUE FOR PULSE DROPPING IN PULSE-WIDTH MODULATED INVERTERS [J].
GRANT, DA .
IEE PROCEEDINGS-B ELECTRIC POWER APPLICATIONS, 1981, 128 (01) :67-72
[9]   Acoustic Noise Reduction in Sinusoidal PWM Drives Using a Randomly Modulated Carrier [J].
Habetler, Thomas G. ;
Divan, Deepakraj M. .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 1991, 6 (03) :356-363
[10]   ELIMINATION OF TONAL ACOUSTIC NOISE IN CHOPPER-CONTROLLED DC DRIVES [J].
HANDLEY, PG ;
JOHNSON, M ;
BOYS, JT .
APPLIED ACOUSTICS, 1991, 32 (02) :107-119