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Control method and device, household appliance and computer readable storage medium
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A control method and control circuit technology, applied in the field of control, can solve the problems of control circuit circuit efficiency and harmonic performance that need to be improved
Active Publication Date: 2020-02-11
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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[0003]
In related technologies, in order to reduce the power consumption of BOOST-type PFC and rectifier, a totem-pole-type PFC module is used to replace BOOST-type PFC and rectifier, but the efficiency and harmonic performance of the control circuit still need to be improved
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Embodiment 1
[0056] Such as figure 1 As shown, a schematicflow chart of a control method according to an embodiment of the present invention is shown, including:
[0057] Step S102, detecting the load driven by the control circuit.
[0058] Step S104, according to the load, control the PFC circuit to work in the high-frequency switching mode or the multi-pulse mode.
[0059] In the above technical solution, by controlling the PFC circuit to work in high-frequency switching mode or multi-pulse mode according to the load, the rise of the bus voltage can be controlled to ensure the reliable operation of the load, or by controlling the PFC circuit according to the load. The pulse mode works to reduce the switching loss and bus voltage loss, which is beneficial to improve the harmonic performance and efficiency of the control circuit.
[0060] In this technical solution, according to the load, the continuous input of variable-frequency high-frequency pulse signal to the switching device is c...
Embodiment 2
[0084] Such as figure 2 As shown, a structural diagram of the BOOST (boost) type PFC circuit according to the control method of an embodiment of the present invention is shown, including:
[0086] Wherein, the PFC circuit includes: an inductance coil L, a diode D1, a diode D2, a diode D3 and a diode D4. When the switching device is turned on, the AC signal AC is given to the PFC circuit, and a pulse signal is output, wherein, C is an electrolytic capacitor.
Embodiment 3
[0088] Such as image 3 As shown, a structural diagram of a totem pole type PFC circuit according to a control method according to an embodiment of the present invention is shown, including:
[0089] AC power supply AC, inductance coil L, diode D1, diode D2, diode D3 and diode D4 are the reverse biased diodes of power tube Q1, power tube Q2, power tube Q3 and power tube Q4 respectively, and also include capacitor C, inverter bridge and A compressor is an example of a load.
[0090] Among them, the PFC circuit includes: inductance coil L, diode D1, diode D2, diode D3 and diode D4, power tube Q1, power tube Q2, power tube Q3, power tube Q4, and the totem pole type PFC circuit can perform synchronous rectification.
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Abstract
The invention provides a control method and device, a household appliance and a computer readable storage medium. The control method is suitable for a control circuit. A PFC (Power Factor Correction)circuit is arranged in the control circuit. When a switching device in the PFC circuit receives a specified pulse signal, an amplitude of a busvoltage output by the PFC circuit is increased. The control method comprises the following steps of detecting a load capacity driven by the control circuit to operate; and controlling the PFC circuit to work in a high-frequency switching mode or a multi-pulse mode according to the load capacity. In the technical scheme of the invention, a busvoltage requirement during a high load is satisfied according to a high-frequency switching mode; in a low load, multi-pulse mode operation is controlled, or the PFC circuit is controlled to be in a synchronous rectification or intermittent state so as to drive a busvoltage provided by the control circuit andmatch an optimal compressor voltage modulation ratio; and an inverter and a power conversion unit are reduced so that normal operation of the load can be ensured, a bus voltage loss can be reduced under a condition of the lower load capacity, and meanwhile, switching losses are reduced.
Description
technical field [0001] The present invention relates to the technical field of control, in particular, to a control method, a control device, a household electrical appliance, and a computer-readable storage medium. Background technique [0002] In the current inverter air conditioner market, in order to improve the energy efficiency of load operation, rectifiers, inductors, PFC (Power Factor Correction, power factor correction) modules, electrolytic capacitors and inverters are usually used to form the motor (load) control circuit. [0003] In the related art, in order to reduce the power consumption of the BOOST PFC and the power consumption of the rectifier, a totem pole PFC module is used to replace the BOOST PFC and the rectifier. However, the efficiency and harmonic performance of the control circuit still need to be improved. [0004] In addition, any discussion of the background technology in the entire specification does not mean that the background technology must ...
Claims
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Application Information
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