Loss minimized PWM for voltage source inverters taking into account inverter non-linearity
First Claim
1. A pulse width modulation (PWM) selection device comprising:
- a PWM control module that determines a desired pulse width of a switching control signal according to a desired output signal, and that controls an actual pulse width of the switching control signal according to the desired pulse width and a first PWM control method;
a selection module that determines whether the desired pulse width exceeds a pulse width threshold, and that selects a second PWM control method when the desired pulse width exceeds the pulse width threshold.
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Abstract
A dynamic pulse width modulation (PWM) selection device automatically switches between discontinuous PWM (DPWM) control methods. The PWM selection device comprises a PWM control module. The PWM control module determines a desired pulse width of a switching control signal according to a desired output signal. The PWM control module controls an actual pulse width of the switching control signal according to the desired pulse width and a first PWM control method. A selection module determines whether the desired pulse width exceeds a pulse width threshold. The selection module selects a second PWM control method when the desired pulse width exceeds the pulse width threshold.
35 Citations
16 Claims
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1. A pulse width modulation (PWM) selection device comprising:
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a PWM control module that determines a desired pulse width of a switching control signal according to a desired output signal, and that controls an actual pulse width of the switching control signal according to the desired pulse width and a first PWM control method; a selection module that determines whether the desired pulse width exceeds a pulse width threshold, and that selects a second PWM control method when the desired pulse width exceeds the pulse width threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A pulse width modulation (PWM) selection device comprising:
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a first PWM control module that determines a first desired pulse width of a first switching control signal according to a desired output signal, and that controls an actual pulse width of the first switching control signal according to the desired pulse width and a first PWM control method; a second PWM control module that determines a second desired pulse width of a second switching control signal according to the desired output signal, and that controls an actual pulse width of the second switching control signal according to the second desired pulse width and a second PWM control method; a selection module that receives the first switching control signal and the second switching control signal, that determines whether the first desired pulse width exceeds a pulse width threshold, that outputs the first switching control signal when the first desired pulse width does not exceed the pulse width threshold, and that outputs the second switching control signal when the first desired pulse width exceeds the pulse width threshold. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification