Non-contact power supply having built-in coupling detection device and coupling detection method thereof
First Claim
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1. A non-contact power supply, comprising:
- a detachable transformer comprising;
a primary side; and
a secondary side;
a current sensor coupled to the primary side and sensing a primary side current;
a controller generating a switching signal, coupled to the current sensor and comprising a built-in program for manipulating the power supply and initializing the power supply at a detecting mode;
a first rectifying apparatus coupled to an external AC power source in parallel and outputting a first DC voltage;
a switch module coupled to the first rectifying apparatus, the primary side and the controller, receiving the first DC voltage and the switching signal and outputting a first AC voltage to the primary side; and
a second rectifying apparatus coupled to the secondary side, receiving a second AC voltage and generating a second DC voltage,wherein the transformer is under a coupling status when the current is smaller than a first current value, and then the controller makes the power supply switch to a power transmission mode;
the transformer is under a separate status when the current is larger than a second current value, and then the controller makes the power supply switch to the detecting mode;
the switch module works under a first switching frequency to generate a high level of the first AC voltage, and the switch module works under a second switching frequency to generate a low level of the first AC voltage.
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Abstract
The configurations of a non-contact power supply and a coupling detection method thereof are provided. The proposed non-contact power supply includes a detachable transformer including a primary side, a current sensor coupled to the primary side and sensing a primary side current and a controller coupled to the current sensor, receiving the current and determining whether the power supply is under a coupling status according to the current.
26 Citations
23 Claims
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1. A non-contact power supply, comprising:
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a detachable transformer comprising; a primary side; and a secondary side; a current sensor coupled to the primary side and sensing a primary side current; a controller generating a switching signal, coupled to the current sensor and comprising a built-in program for manipulating the power supply and initializing the power supply at a detecting mode; a first rectifying apparatus coupled to an external AC power source in parallel and outputting a first DC voltage; a switch module coupled to the first rectifying apparatus, the primary side and the controller, receiving the first DC voltage and the switching signal and outputting a first AC voltage to the primary side; and a second rectifying apparatus coupled to the secondary side, receiving a second AC voltage and generating a second DC voltage, wherein the transformer is under a coupling status when the current is smaller than a first current value, and then the controller makes the power supply switch to a power transmission mode;
the transformer is under a separate status when the current is larger than a second current value, and then the controller makes the power supply switch to the detecting mode;
the switch module works under a first switching frequency to generate a high level of the first AC voltage, and the switch module works under a second switching frequency to generate a low level of the first AC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A non-contact power supply, comprising:
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a detachable transformer comprising; a primary side; a current sensor coupled to the primary side and sensing a primary side current; a controller coupled to the current sensor, receiving the current and determining whether the power supply is under a coupling status according to the current; and predetermined value when the power supply is under the separate status. - View Dependent Claims (12, 13)
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14. A coupling detection method for a non-contact power supply, wherein the non-contact power supply comprises a detachable transformer having a primary side, a secondary side, a current sensor, a controller, a first rectifying apparatus coupled to an external AC power source in parallel and outputting a first DC voltage, a switch module coupled to the first rectifying apparatus, the primary side and the controller, receiving the first DC voltage and a switching signal generated by the controller and outputting a first AC voltage to the primary side, wherein the switch module driven by the switching signal works under a first switching frequency and generates a high level of the first AC voltage when the non-contact power supply is under a power transmission mode, and the switch module driven by the switching signal works under a second switching frequency and generates a low level of the first AC voltage when the non-contact power supply is under a detecting mode, a second rectifying apparatus coupled to the secondary side, receiving a second AC voltage and generating a second DC voltage, and a load coupled to the second rectifying apparatus and receiving the second DC voltage, comprising the steps of:
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(a) sensing a primary side current via the current sensor; and (b) determining whether the transformer is under a coupling status according to the current by the controller. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A coupling detection method for a non-contact power supply, wherein the non-contact power supply comprises a detachable transformer having a primary side and a secondary side, a current sensor, a controller, a first rectifying apparatus coupled to an external AC power source in parallel and outputting a first DC voltage, a switch module coupled to the first rectifying apparatus, the primary side and the controller, receiving the first DC voltage and a switching signal generated by the controller and outputting a first AC voltage to the primary side, wherein the switch module driven by the switching signal works under a first switching frequency and generates a high level of the first AC voltage when the non-contact power supply is under a power transmission mode, and the switch module driven by the switching signal works under a second switching frequency and generates a low level of the first AC voltage when the non-contact power supply is under a detecting mode, a second rectifying apparatus coupled to the secondary side, receiving a second AC voltage and generating a second DC voltage, and a load coupled to the second rectifying apparatus and receiving the second DC voltage, comprising the steps of:
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(a) initializing the power supply at the detecting mode; (b) sensing a primary side current via the current sensor; and (c) determining whether the primary side and the secondary side are coupled according to the current by the controller. - View Dependent Claims (22, 23)
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Specification