Auxiliary power source bootstrapping circuit of power source converting device

An auxiliary power supply and power conversion technology, which is applied in the direction of output power conversion devices and electrical components, can solve the problems of large space occupation, high power consumption, and poor reliability, so as to prolong life, reduce instantaneous power consumption, and improve reliability. Effect
CN101951136BActive Publication Date: 2012-09-05杭州富阳中恒电气有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
杭州富阳中恒电气有限公司
Publication Date
2012-09-05

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Abstract

The invention discloses an auxiliary power source bootstrapping circuit of a power source converting device, comprising an input filtering capacitor, a surge protection resistor, a surge protection switch, a bootstrapping charging resistor, a bootstrapping energy storage capacitor and an auxiliary power source. One end of the input filtering capacitor is connected with a high-voltage input positive end while the other end of the input filtering capacitor is connected with a common end of the surge protection switch; a normally-opened point of the surge protection switch is connected with a high-voltage input negative end; the surge protection resistor is connected in parallel between the common point and the normally-opened point of the surge protection switch; one end of the bootstrapping charging resistor is connected with a normally-closed point of the surge protection switch; the other end of the bootstrapping charging resistor is connected with one end of the bootstrapping energystorage capacitor; the other end of the bootstrapping energy storage capacitor is connected with a high-voltage input negative end; and a control power supply end of the auxiliary power source is connected in parallel at the two ends of the bootstrapping energy storage capacitor. The auxiliary power source bootstrapping circuit of the power source converting device has the advantages of reducing the power consumption and the occupation space and improving the reliability.
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Description

technical field

[0001] The invention relates to an auxiliary power supply bootstrap circuit, which is suitable for auxiliary power supply bootstrap startup occasions in various medium and high-power power conversion devices. Background technique

[0002] In all kinds of medium and high-power power conversion devices, the auxiliary power supply is used as the power supply of the control circuit. When the device is started, the auxiliary power supply must first realize the bootstrap start, and then the device can be started. Such as figure 1 Shown is a typical auxiliary power supply bootstrap start-up and anti-surge circuit of a power conversion device. The schematic diagram of the auxiliary power supply is shown in the dotted line box. First, the high voltage is input to charge the input filter capacitor (C1) and C2 through resistors R1 and R2 respectively. , when the voltage of C2 reaches the starting voltage of the auxiliary power controller, the auxiliary power starts to ...

Claims

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