Power governor and control method thereof
A power conditioner and control signal technology, applied in the direction of adjusting electrical variables, control/regulating systems, output power conversion devices, etc., can solve the problems of harmonic need compensation, complex circuit structure, complex filter circuit design, etc., to achieve switching The effect of constant frequency, reduced circuit cost, and enhanced stability
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Embodiment 1
[0044] Figure 6A Shown is a functional block diagram of the fixed time generating circuit 5 according to an embodiment of the present invention. Figure 6B shown as Figure 6A working waveform.
[0045] Figure 6A The shown fixed time generating circuit 5 includes three parts: a reference voltage generating module 51 , a ramp signal generating module 52 and a comparing module 53 .
[0046] The reference voltage generating module 51 is composed of a switching circuit and an averaging circuit; the switching circuit receives a PWM control signal and a reference source signal, and the averaging circuit performs an averaging operation on the received PWM control signal.
[0047] The comparison module 53 of this embodiment is realized by a comparator 609 .
[0048] The switch circuit includes an inverter 612, a first transistor 601, and a second transistor 602;
[0049] The averaging circuit includes a resistor 611 and a first capacitor 621; wherein the gate of the second tran...
Embodiment 2
[0072] Please refer to Figure 7A with Figure 7B , is a functional block diagram of the fixed time generating circuit 5 according to another embodiment of the present invention. Figure 7B shown as Figure 7A working waveform.
[0073] Figure 7A The preferred fixed time generation circuit shown generally includes three parts: a reference voltage generation module 51 , a ramp signal generation module 52 and a comparison module 53 .
[0074] The reference voltage generating module 51 may be composed of a switch circuit and an average circuit; the switch circuit receives the PWM control signal, and the average circuit performs an average operation on the received PWM control signal;
[0075] Same as the first embodiment, the comparison module 53 is realized by a comparator 609 .
[0076] The switch circuit includes an inverter 612, a first transistor 601, and a second transistor 602;
[0077] The averaging circuit includes a resistor 611 and a first capacitor 621;
[007...
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