Invention Grant
- Patent Title: Circuit for controlling the current in inductive loads and control method therefor
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Application No.: US15793464Application Date: 2017-10-25
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Publication No.: US10982785B2Publication Date: 2021-04-20
- Inventor: Sergio Lecce
- Applicant: STMICROELECTRONICS S.R.L.
- Applicant Address: IT Agrate Brianza
- Assignee: STMICROELECTRONICS S.R.L.
- Current Assignee: STMICROELECTRONICS S.R.L.
- Current Assignee Address: IT Agrate Brianza
- Agency: Seed IP Law Group LLP
- Priority: IT102017000034070 20170328
- Main IPC: F16K31/06
- IPC: F16K31/06 ; H01H47/32 ; H01F7/18 ; B60T8/176 ; B60T17/04 ; H01F7/06 ; H03K7/08

Abstract:
A circuit for controlling current in an inductive load is provided. The circuit includes a driver circuit for driving a load current in the inductive load. The driver circuit includes a switch, which is switched on to increase the load current and a recirculation diode, which re-circulates the load current when the switch is off. The circuit includes a control module that generates a control signal to switch on and off the switch. The control module includes a PWM current controller comprising a negative feedback closed loop implementing at least a proportional control and an integral control. The PWM current controller receives a target current value and an estimated current flowing in the load during a measurement PWM cycle. The PWM current controller generates the control signal for a control input of the switch based on an error between the target current and the estimated current.
Public/Granted literature
- US20180283570A1 CIRCUIT FOR CONTROLLING THE CURRENT IN INDUCTIVE LOADS AND CONTROL METHOD THEREFOR Public/Granted day:2018-10-04
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