Novel speed regulating system suitable for driving electric automobile and current distributing method

Abstract

The invention discloses a novel speed regulating system suitable for driving an electric automobile, which comprises the following steps: collecting phase currents iA, iB and exciting current if from an HESM (hybrid excitation synchronous machine) motor main circuit; collecting a real-time rotating speed nr from the HESM motor; obtaining d-q-axis currents id and iq after transforming the collected phase currents; comparing d-q-axis currents id and iq respectively with d-axis reference current idref and q-axis reference current iqref obtained from a current distributer and carrying out PID (proportion integration differentiation) operation, carrying out a reverse Park transformation and a space vector voltage pulse width modulation and outputing a pulse signal to control conduction and disconnection of a power tube corresponding to a armature driving module, and outputing the exciting current if and the exciting reference current ifref through an exciting driving signal generating module to control conduction and disconnection of the power tube corresponding to the exciting driving module, wherein the HESM motor adopts a dual-stator structure, an armature winding is arranged on an outer stator, and an inner stator is provided with an exciting winding; the motor rotor is configured as a claw pole shape, a permanent magnetic steel and a magnetizing iron core are in staggered arrangement on the claw pole, and the area rate of the permanent magnetic steel to the magnetizing iron core is 2:1.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a HESM speed regulation system suitable for driving an electric vehicle, and proposes a method for how to distribute current in the speed regulation system. Background technique [0002] Because traditional automobiles bring energy shortages, excessive carbon dioxide emissions, air pollution and other contemporary human society resource and environmental problems, many automobile product manufacturers at home and abroad are looking for a low-carbon development path. The emergence of new energy vehicles has become a new industry growth point spawned by the low-carbon economy. [0003] In the development strategy of new energy vehicles, the future strategic goals of most countries in the world basically focus on three new energy vehicles: hybrid, pure electric and hydrogen fuel cell. These three new energy vehicles all use batteries as power. Due to the limited capacity of...

AI Technical Summary

Problems solved by technology

However, there are relatively few and in-depth studies on the drive system of this type of motor.

At present, most of the existing literature is researched from the perspective of control theory and dynamic simulation. There is no complete optimal efficiency control scheme based on vector control for the minimum total copper consumption for general HESM.

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