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US 12,676,471 B2Granted
Control circuit of galvanometer motor and LiDAR
AssigneeSuteng Innovation Technology Co., Ltd.
InventorHuamin Lang
Life of this patent
Estimating the term…
Abstract
Embodiments of this application disclose a control circuit of a galvanometer motor and a LiDAR. The control circuit is configured to control the galvanometer motor to be discharged during a power failure, and the control circuit includes a switch circuit and a discharge circuit. The switch circuit is configured to access a control voltage; and the discharge circuit is connected to the switch circuit and configured to be connected to a driving positive electrode and a driving negative electrode of the galvanometer motor.
Claims8
A control circuit of a galvanometer motor, configured to control the galvanometer motor to be discharged during a power failure, wherein the control circuit comprises:
- a switch circuit, configured to access a control voltage;
- and
- a discharge circuit, connected to the switch circuit and configured to be connected to a driving positive electrode and a driving negative electrode of the galvanometer motor,
- wherein during the power failure, the switch circuit controls the discharge circuit to be short-circuited based on the control voltage, to release a reverse induction electromotive force between the driving positive electrode and the driving negative electrode of the galvanometer motor that is generated due to the power failure;
- wherein the switch circuit comprises:
- a voltage divider circuit comprising at least two voltage divider resistors, wherein the voltage divider circuit comprises a terminal configured to access the control voltage, and the other terminal that is grounded, and there is a voltage divider node between any two of the voltage divider resistors;
- and
- a first switch transistor having a first input terminal, a first output terminal, and a first controlled terminal, wherein the first input terminal is configured to access a first control voltage, the first output terminal is connected to the discharge circuit, and the first controlled terminal is connected to the voltage divider node;
- wherein the discharge circuit comprises a second switch transistor, a third switch transistor, and a bias resistor;
- wherein the second switch transistor comprises a second input terminal, a second output terminal, and a second controlled terminal;
- wherein the third switch transistor comprises a third input terminal, a third output terminal, and a third controlled terminal;
- wherein the second controlled terminal and the third controlled terminal are jointly connected to the first output terminal and a first terminal of the bias resistor;
- wherein the second output terminal and the third output terminal are jointly connected to a second terminal of the bias resistor;
- and
- wherein the second input terminal is connected to the driving positive electrode, and the third input terminal is connected to the driving negative electrode.
12 more elements
A LiDAR, comprising:
- a galvanometer, configured to change an outgoing direction of a laser beam;
- a galvanometer motor, drivingly connected to the galvanometer and having a driving positive electrode and a driving negative electrode;
- and
- a control circuit of the galvanometer motor, comprising:
- a switch circuit, configured to access a control voltage;
- and
- a discharge circuit, connected to the switch circuit and configured to be connected to the driving positive electrode and the driving negative electrode of the galvanometer motor,
- wherein during a power failure, the switch circuit controls the discharge circuit to be short-circuited based on the control voltage, to release a reverse induction electromotive force between the driving positive electrode and the driving negative electrode of the galvanometer motor that is generated due to the power failure;
- wherein the switch circuit comprises:
- a voltage divider circuit comprising at least two voltage divider resistors, wherein the voltage divider circuit comprises a terminal configured to access the control voltage, and the other terminal that is grounded, and there is a voltage divider node between any two of the voltage divider resistors;
- and
- a first switch transistor having a first input terminal, a first output terminal, and a first controlled terminal, wherein the first input terminal is configured to access a first control voltage, the first output terminal is connected to the discharge circuit, and the first controlled terminal is connected to the voltage divider node;
- wherein the discharge circuit comprises a second switch transistor, a third switch transistor, and a bias resistor;
- wherein the second switch transistor comprises a second input terminal, a second output terminal, and a second controlled terminal;
- wherein the third switch transistor comprises a third input terminal, a third output terminal, and a third controlled terminal;
- wherein the second controlled terminal and the third controlled terminal are jointly connected to the first output terminal and a first terminal of the bias resistor;
- wherein the second output terminal and the third output terminal are jointly connected to a second terminal of the bias resistor;
- and
- wherein the second input terminal is connected to the driving positive electrode, and the third input terminal is connected to the driving negative electrode.
16 more elements
Dependencies are inferred from the claim text.