Abstract
With the increased availability of power MOSFET's and insulated gate bipolar transistors, a new generation of simple choppers for ac inductive loads is foreseen. These new power semiconductors ease the use of forced commutations of thyristor switches to improve the supply power factor, even with highly inductive loads. The ac controllers with thyristor technology can be replaced by pulsewidth modulation (PWM) ac chopper controllers which have important advantages. In this paper, a symmetrical PWM ac chopper designed to operate with singlephase inductive loads with a reduced number of controlled switches is described. The operation as a variable voltage source of this converter is evaluated. This includes the conversion characteristics, harmonic generation, harmonic distortion factor, and input power factor. By digital simulation, these characteristics are investigated theoretically, and to correlate the measurements with theory, an experimental setup is presented to confirm the analytical analysis.
| Original language | English |
|---|---|
| Pages (from-to) | 942-952 |
| Number of pages | 1 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 46 |
| Issue number | 5 |
| State | Published - 1999/10 |
Keywords
- Ac chopper
- Duty cycle
- Harmonic distortion
- Switching function
- Symmetrical pulsewidth modulation
- Voltage controller
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering