Isolation circuit and motor controller
By designing an isolation circuit including a signal input terminal, a first capacitor C1, a voltage diode D1, a first resistor R1, a second capacitor C2, a comparator U2 and a signal output terminal, the problem of high cost of digital isolation chips is solved, and efficient high-voltage isolation and single-signal isolation are achieved.
CN222638520UActive Publication Date: 2025-03-18XIAOMI EV TECH CO LTD
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Patent Information
- Application Number
- CN202421306747.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-07
AI Technical Summary
Technical Problem
In the prior art, high voltage isolation between different reference grounds is problematic with high cost.
Method used
An isolation circuit is designed, including a signal input terminal, a first capacitor C1, a voltage diode D1, a first resistor R1, a second capacitor C2, a comparator U2 and a signal output terminal, and a conducting target loop is formed through these components to achieve high voltage isolation.
Benefits of technology
The cost of high-voltage isolation is reduced and the effect of single signal isolation is achieved.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model relates to an isolation circuit and a motor controller. The isolation circuit comprises a signal input end; the first end of the first capacitor C1 is coupled with the signal input end, and the second end of the first capacitor C1 is connected with the lower bridge ground; the first end of the voltage diode D1 is connected with the first end of the first capacitor C1; the first end of the first resistor R1 is connected with the second end of the voltage diode D1; the first end of the second capacitor C2 is connected with the second end of the first resistor R1, and the second end of the second capacitor C2 is connected with the upper bridge ground 39637; the first end of the comparator U2 is respectively connected with the first resistor R1 and the second capacitor C2, and the second end of the comparator U2 is coupled with the first power supply V1; and the first end of the signal output end is connected with the third end of the comparator U2, and the second end of the signal output end is connected with the first power supply V1. The isolation function is realized by using the isolation circuit, so that the high-voltage isolation cost can be reduced.
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