Coating composition for electromagnetic steel sheet, electromagnetic steel sheet, laminated iron core, and rotating electrical machine
By using a coating composition for electromagnetic steel plates with a specific composition, an insulating film is formed to achieve both the magnetic characteristics and heat resistance of the laminated iron core, and the problem of decreasing bond strength in the prior art is solved, and it is suitable for high-efficiency rotating motor applications such as electric vehicles.
Patent Information
- Application Number
- CN202180042911.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2020-06-17
- Filing Date
- 2021-06-17
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2041-06-17
AI Technical Summary
The prior art is difficult to take into account the magnetic properties of the stacked iron core and the heat resistance of maintaining the bonding strength of the electromagnetic steel plate under high temperature conditions, especially in medium and high temperature environments for electric vehicle driving.
The coating composition for electromagnetic steel plates consisting of epoxy resin, alkyl phenol as the first curing agent, and phenol novolac resin as the second curing agent is used to form an insulating film to achieve bonding by specific ratios and sintering conditions.
It realizes heat resistance to maintain the bonding strength of electromagnetic steel plates under high temperature conditions, and at the same time optimizes the magnetic characteristics of the stacked iron core and reduces iron losses. It is suitable for efficient rotating motor applications such as electric vehicles.