Multi-DC input pwm inverter drive device and method thereof
A technology of inverter drive and multi-DC, which is applied in the direction of control drive, transportation and packaging, AC motor control, etc., and can solve the instability of the output voltage and its vector change of super capacitor banks or similar capacitors, and the compensation calculation of output voltage or vector change complex and unstable
Active Publication Date: 2017-12-22
周衍
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Problems solved by technology
During the driving process of this type of vehicle, the output voltage of the supercapacitor bank or similar capacitors and its vector changes are unstable, and the imbalance compensation part in Reference 1 performs compensation calculations based on the unstable output voltage or vector changes. and unstable
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[0069] Below in conjunction with accompanying drawing and specific example, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.
[0070] Such as figure 1 As shown, this embodiment exemplarily discloses a working principle diagram of a multi-DC input PWM inverter drive device and a permanent magnet synchronous motor; since the permanent magnet synchronous motor is a three-phase input, the PWM drive circuit of each phase of the motor Directly drive one winding of the motor, the motor is driven separately in three phases, and is not connected through star or delta. The permanent magnet synchronous...
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The invention discloses a multi-direct-current-input PWM inversion driving device and method. Inversion current is provided by two different direct-current power sources, the absolute value of transient voltage flowing across an ideal alternating-current model is compared with the absolute values of voltages of the two direct-current power sources so as to determine the direct-current power source suitable for serving as an inversion source, and connect the determined direct-current power source into an inversion circuit. In addition, after the corresponding direct-current power source is connected into the inversion circuit, the working section, adapting to the inversion source, of the corresponding direct-current power source is calculated according to the size of the corresponding direct-current power source, a PWM control circuit controls the inversion circuit according to the working section so that the inversion circuit can generate practical alternating-current voltage equivalent to the ideal alternating-current model in the working section, and thus it can be maintained that in the process that two or even more direct-current power sources are alternately connected into the inversion circuit, equivalent and stable practical alternating-current voltage can be output in each working cycle of the inversion circuit.
Description
technical field [0001] The invention relates to the technical field of DC inverter drive, which selectively cuts at least two DC power supplies with different voltage values into the inverter bridge circuit during the process of DC inverter and AC to realize that multiple DC power supplies directly serve as inverter circuits. powered by. Background technique [0002] A patent document with publication number CN104969459A (hereinafter referred to as reference document 1) discloses an emergency operation device and method for an inverter for an electric vehicle. It can compensate the unbalance of the three-phase current caused by the unbalanced voltage of the DC link end, and generate a new command value voltage to which a correction voltage capable of compensating for the variation of the DC link end is added. [0003] Specifically, the voltage detection part of Reference Document 1 captures the voltages V1 and V2 of the upper and lower links, and outputs them to the unbal...
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IPC IPC(8): B60L11/18B60L15/00H02P27/08H02P29/02
CPCB60L15/007B60L50/51B60L2210/46H02P27/085B60L15/02B60L50/40B60L58/20Y02T10/64Y02T10/70
Inventor 周衍
Owner 周衍