Series-parallel electric vehicle drive system

Abstract

A system of one or more computers can be configured to perform particular operations or actions by virtue of having software, firmware, hardware, or a combination of them installed on the system thatin operation causes or cause the system to perform the actions. One or more computer programs can be configured to perform particular operations or actions by virtue of including instructions that, when executed by data processing apparatus, cause the apparatus to perform the actions. One general aspect includes a series-parallel electric vehicle drive system, including a controller commutativelycoupled to at least one inverter circuit with a serial insulated gate bipolar transistor (IGBT) and a parallel IGBT. The system includes a dc power source connected to an inverter circuit and a winding of a motor connected to an output of the invert circuit, wherein the inverter circuit generates a motor control signal.

Description

technical field [0001] The present invention relates generally to vehicle drives and, more particularly, to series-parallel electric vehicle drive systems. Background technique [0002] An electric vehicle (EV) uses one or more electric motors or traction motors for its propulsion purposes. The EV's propulsion system can use various regulators and inverters to regulate and convert direct current (DC) from the battery to the alternating current (AC) required by the EV's induction motor. The speed of the electric motor or traction motor can be adjusted by controlling the frequency and phase of the inverter. [0003] However, electric motors in EVs may require expensive discrete components to draw up to 1,000 amps for regulation and inversion. These expensive discrete components require complex heat sinks to dissipate the heat generated when switching DC to a pulse width modulated (PWM) voltage. Various circuits and control strategies have been developed to address cost and ...

AI Technical Summary

Problems solved by technology

[0003] However, electric motors in EVs may require expensive discrete components to draw up to 1000 amps for regulation and inversion

These expensive discrete components require complex heat sinks to dissipate the heat generated when switching DC to pulse width modulated (PWM) voltages

Various circuits and control strategies have been developed to address cost and heat issues, but these existing approaches are often complex and difficult to implement

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