Power conversion installment kit for plug-in hybrid electric vehicle

摘要

A power conversion system for HEV, which comprising: a battery pack and inverter power conversion module for generating DC voltage; the inverter power conversion module is used to convert DC voltage into DC high voltage required for driving the motor of HEV; while the power conversion effect is guaranteed, the present invention could reduce markedly the amount of batteries for the battery pack, minimize the cost and weight, while the connections of batteries and possible unreliable factors are cut down for more reliable connection and simpler processing.

主权项

1. A power conversion installment kit for plug-in HEV, comprising at least:
a battery pack, used to generate a DC voltage; and an inverter power conversion module, with its input end linked to the battery pack, and its output end linked to a DC motor of the HEV, used to convert the DC voltage into a DC high voltage; the required DC high voltage shall be capable of at least driving the DC motor wherein the inverter power conversion module includes at least: a voltage-regulating module, connected with an anode of the battery pack, and used to regulate the DC voltage for providing a stable DC low voltage; a high-frequency oscillating circuit, with a first end linked to the voltage-regulating module, and powered by the DC low voltage to output a high-frequency small signal, and a second end linked to a high-frequency power amplifier circuit; wherein the high-frequency power amplifier circuit is used to receive and to amplify the high-frequency small signal, and to generate a high-power high-frequency signal; a high-frequency transformer, used to receive the high-power high-frequency signal and boost to a high voltage; a rectifier circuit, bridged onto a secondary end of the high-frequency transformer, with its output end linked to the DC motor of the HEV; the rectifier circuit rectifies the high voltage and then outputs the required DC high voltage to drive the DC motor; wherein the rectifier circuit is a bridged rectifier circuit composed of four rectifier diodes; wherein the inverter power conversion module also including at least: a reference generator circuit, with a first end linked to the voltage-regulating module, and the second end linked to a cathode of the battery pack, helping to provide a reference voltage for a decision circuit module; a sampling decision circuit, comprising of a first and a second sampling circuits and the decision circuit module; the first sampling circuit is connected between the anode and the cathode of the battery pack, allowing for sampling of the output voltage of the battery pack to acquire a first sampling value; and, the first sampling value is sent to the decision circuit module; the second sampling circuit is linked to the output end of the rectifier circuit, and used to sample the required DC high voltage of the rectifier circuit to acquire a sampling voltage, and also send the sampling voltage to the decision circuit module; an oscillating control circuit, linked to the decision circuit module and the high-frequency oscillating circuit, used to receive the output of the decision circuit module, and to control the operation of the high-frequency oscillating circuit.