Plug-and-play solid state controller for high efficiency motors
By using a solid-state controller in a high-efficiency induction motor and using a microprocessor and comparator to control the current, the high inrush current and high starting current problems of the high-efficiency induction motor are solved, and the efficient start-up of the motor and the resource optimization of the protection device are achieved.
CN120185440APending Publication Date: 2025-06-20ABB (SCHWEIZ) AG
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Patent Information
- Application Number
- CN202411862060.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-18
- Filing Date
- 2024-12-17
- Publication Date
- 2025-06-20
AI Technical Summary
Technical Problem
High efficiency induction motors generate high inrush current and high starting current when starting, resulting in increased thermal stress and mistrip of protection devices, and traditional protection devices are resource-intensive and cost-effective.
Method used
A solid-state controller is designed to generate trigger phase angle and stop time through a microprocessor and comparator, control the on- and off of the solid-state controller, and limit the start current of the induction motor.
Benefits of technology
It effectively reduces the starting current and inrush current of high-efficiency induction motors, reduces the thermal stress of the protection device, improves the power density of the solid-state controller, and reduces the cost.
✦ Generated by Eureka AI based on patent content.
Abstract
A solid state controller for limiting a starting current in an induction machine is provided. The solid state controller includes a first comparator configured to generate a first comparison result based on a comparison of a rotor speed of the induction motor to a rotor speed threshold. The solid state controller includes a phase current limiter configured to generate a start-up current limit based on a comparison result received from the first comparator. The solid state controller includes a second comparator configured to generate a second comparison result based on a comparison of a starting current of the induction motor to a starting current limit. The solid state controller includes a microprocessor configured to generate, based on the second comparison result, a trigger phase angle, where the trigger phase angle is a phase angle when the solid state controller is turned on, and to generate a stop time at which the solid state controller is turned off.
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