Bootstrap circuit control method and control system
A bootstrap circuit and control method technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of large impact on the control power supply, unstable operation of the bootstrap circuit, etc., to reduce current impact, reduce hardware requirements, and ensure The effect of job reliability
Active Publication Date: 2018-06-12
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0005] In view of this, the present invention provides a bootstrap circuit control method and control system to solve the large impact of the control power supply and the unstable operation of the bootstrap circuit when the single pulse control method is used to control the bootstrap circuit in the prior art. The problem
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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0034] An embodiment of the present invention provides a control method of a bootstrap circuit, such as image 3 As shown, the bootstrap circuit is the bootstrap circuit of the IPM module, and the bootstrap circuit includes a first bootstrap circuit, a second bootstrap circuit and a third bootstrap circuit, and the first bootstrap circuit is used to supply the three-phase circuit The control circuit of the first upper arm switch tube IGBT1 of the U-phase circu...
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The invention provides a control method and a control system of a bootstrap circuit. The control method includes: a first time sequence inputs first bootstrap control signals including a plurality of pulses to a control circuit of a first lower bridge arm switch tube so that a first bootstrap circuit is controlled to supply power to a control circuit of a first upper bridge arm switch tube; a second time sequence inputs second bootstrap control signals including a plurality of pulses to a control circuit of a second lower bridge arm switch tube so that a second bootstrap circuit is controlled to supply power to a control circuit of a second upper bridge arm switch tube; and a third time sequence inputs third bootstrap control signals including a plurality of pulses to a control circuit of a third lower bridge arm switch tube so that a third bootstrap circuit is controlled to supply power to a control circuit of a third upper bridge arm switch tube. According to the control method and the control system, since the bootstrap control signals are multi-pulse signals so that the current impact instantly borne by a control power supply can be reduced, and the bootstrap circuits can stably work.
Description
technical field [0001] The present invention relates to the technical field of circuit control, and more particularly, to a bootstrap circuit control method and control system. Background technique [0002] The usual IPM (Intelligent Power Module, intelligent power module) module is powered by four independent power supplies, among which, the control circuits of the three lower-arm switch IGBTs (Insulated Gate Bipolar Transistor, insulated gate bipolar transistors) share one control circuit Power supply, the control circuit of the three upper-arm switch tubes ICBT is powered by three independent power supplies. However, in order to use a single control power supply to supply power, three bootstrap circuits must be used to supply power to the control circuits of the three high-side switch IGBTs respectively. [0003] like figure 1 As shown, the control power supply V that supplies power to the control circuits of the lower bridge arm switches IGBT4, IGBT5 and IGBT6 D After...
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IPC IPC(8): H02M1/096
Inventor 杨帆胡雅洁
Owner GREE ELECTRIC APPLIANCES INC