CN210536294U - Circuit breaker device with two built-in power supplies - Google Patents
Circuit breaker device with two built-in power supplies Download PDFInfo
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- CN210536294U CN210536294U CN201920554538.5U CN201920554538U CN210536294U CN 210536294 U CN210536294 U CN 210536294U CN 201920554538 U CN201920554538 U CN 201920554538U CN 210536294 U CN210536294 U CN 210536294U
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Abstract
The utility model relates to a circuit structure field for the circuit breaker, especially a circuit breaker device of built-in two way power, the input interface of circuit breaker major loop and a power module is connected, includes rectifier circuit, filter circuit, adjusting circuit and the transformer that connects in order in this power module, the output interface of transformer is two way power, and the mutual electrical isolation between two way power exports first voltage and second voltage respectively; the input interface of the power supply module is used for multi-phase power taking and is connected with each phase of a main circuit of the circuit breaker; each phase is connected with a corresponding current-limiting resistor and a corresponding voltage dependent resistor, any two phases are not powered down, and the power supply can normally output.
Description
Technical Field
The utility model belongs to the technical field of circuit structure and specifically relates to a circuit breaker device of built-in two way power.
Background
At present, along with the technical progress, the electronic low-voltage circuit breaker is widely applied, a built-in current transformer is mostly adopted for the electronic circuit breaker to provide a power supply for a controller, in the condition, when the circuit breaker flows a small current, the energy generated by the current transformer is insufficient to ensure that the controller can be normally started, and when overvoltage, undervoltage protection and ground faults occur under the condition, the controller is not started yet, so that protection cannot be provided.
Patent 201410699716.5 proposes a solution, has increased external auxiliary power supply for electronic type circuit breaker, and when the main loop was led to the undercurrent, the energy that current transformer produced was not enough to start the controller, and external auxiliary power supply can provide the energy for the controller, guarantees its normal work. However, the external power supply and the circuit breaker are split and are arranged outside the circuit breaker, so that on one hand, a user occupies a large space when using the circuit breaker, and on the other hand, hidden troubles such as wrong wiring connection exist during installation.
On the other hand, in the circuit breaker controller with the communication function, the power supply of the communication circuit needs to be completely and electrically isolated from the power supply of the controller part, so that at least two paths of power supplies are needed. At present, a scheme that another power supply can be generated by connecting a DC/DC module in parallel at the rear end of a transformer of an internal power supply is adopted by a manufacturer, but the DC/DC module is large in size and high in cost and is not beneficial to being placed in a circuit breaker.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a rational in infrastructure, and accessible built-in power supply lasts the circuit breaker device of two tunnel power supplies for the controller under the undersize current state.
The utility model adopts the technical proposal that:
a circuit breaker device with two built-in power supplies comprises a circuit breaker main loop and is characterized in that the circuit breaker main loop is connected with an input interface of a power supply module, a rectifying circuit, a filtering circuit, an adjusting circuit and a transformer are sequentially connected in the power supply module, an output interface of the transformer is two power supplies, and the two power supplies are mutually electrically isolated and respectively output a first voltage and a second voltage.
Moreover, the input interface of the power supply module is multi-phase power taking and is connected with each phase of the main circuit of the circuit breaker; each phase is connected with a corresponding current-limiting resistor and a corresponding voltage dependent resistor, any two phases are not powered down, and the power supply can normally output.
Moreover, the rectification circuit adopts a full-wave rectification circuit composed of diodes.
Moreover, the filter circuit comprises a common-mode inductor, a capacitor and a voltage-sharing resistor.
And, the regulating circuit adopts the PWM module, and this PWM module output high frequency pulse signal is to the transformer.
Furthermore, the PWM module includes a power supply circuit and a feedback circuit.
And the high-frequency pulse signal enters a primary winding of a transformer through a power supply circuit, the transformer is provided with a first secondary winding and a second secondary winding, and the first secondary winding and the second secondary winding are completely isolated and respectively output a first voltage and a second voltage.
The utility model has the advantages that:
in the utility model, one end of the input interface is connected with each phase of the main loop through a wire, namely three-phase or four-phase, wherein any two phases are not powered down, and the other end is connected with the current-limiting resistor and the piezoresistor, so that the product has good surge impact resistance; a full-wave rectification circuit composed of a plurality of diodes converts a three-phase alternating current signal into a direct current signal; then smoothing the direct current signal through a filter circuit consisting of a capacitor and a common mode inductor; then, outputting a high-frequency pulse signal to the transformer through the adjusting circuit, and respectively outputting a first voltage and a second voltage by matching the primary winding with the first secondary winding and the second secondary winding; the first voltage and the second voltage may respectively supply power to a control circuit of the circuit breaker and a communication circuit inside thereof.
The utility model discloses in, adopt built-in power supply, can be so that the circuit breaker controller passes through built-in power supply when the undercurrent for the function is more comprehensive, provides stable power basis for voltage protection, earth leakage protection, ground protection, communication function's realization. Compared with the scheme that a transformer is adopted to output one path of power supply and then a DC/DC module is used to output one path of power supply in parallel in the prior art, the scheme that a built-in switching power supply outputs two paths of isolated power supplies saves one DC/DC module, reduces the size and simultaneously reduces the cost. Because the communication circuit is connected with an external upper computer, the communication circuit is possibly influenced by external electromagnetism, lightning stroke, electric shock and the like, and the communication module is burnt. Therefore, the scheme that two windings on the secondary side of the transformer of the switching power supply output two paths of isolated power supplies is adopted, so that the controller circuit of the circuit breaker is completely and electrically isolated from the power supply of the communication module circuit. Even if the communication module is burnt, the controller is not affected and can normally play a protection role.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The utility model provides a circuit breaker device of built-in two way power, includes the circuit breaker major loop, the utility model discloses an innovation lies in, the input interface of circuit breaker major loop and a power module is connected, including rectifier circuit, filter circuit, adjusting circuit and the transformer that connects in order in this power module, the output interface of transformer is two way power, and mutual electrical isolation exports first voltage and second voltage respectively between two way power.
In this embodiment, the input interface of the power module is a multi-phase power supply and is connected to each phase of the main circuit of the circuit breaker; each phase is connected with a corresponding current-limiting resistor and a corresponding voltage dependent resistor, any two phases are not powered down, and the power supply can normally output.
In this embodiment, the rectifier circuit is a full-wave rectifier circuit including diodes.
In this embodiment, the filter circuit includes a common mode inductor, a capacitor, and a voltage equalizing resistor.
In this embodiment, the adjusting circuit adopts a PWM module, and the PWM module outputs a high-frequency pulse signal to the transformer.
In this embodiment, the PWM module includes a power supply circuit and a feedback circuit.
In this embodiment, the high-frequency pulse signal enters a primary winding of a transformer through a power supply circuit, the transformer is provided with a first secondary winding and a second secondary winding, and the first secondary winding and the second secondary winding are completely isolated and respectively output a first voltage and a second voltage.
In this embodiment, the first voltage of the circuit breaker is 12V; the second voltage is 9V.
In this embodiment, the circuit breaker includes mechanical devices such as a controller, a built-in power module, a current transformer, a release, and a housing thereof.
The utility model discloses a working process is:
in the embodiment, each phase circuit of the breaker passes through a current transformer, the secondary output end of each transformer is connected with the breaker, when primary current passes through the main loop, the transformers generate secondary current, and the secondary current is used as a power supply to supply power to the controller. On the one hand, the secondary signal is analyzed and processed by the controller as a signal.
The utility model discloses during the use, when the electric current In the circuit breaker major loop was less than 0.2In, the produced electric current of current transformer was not enough to make the controller start, and power module has played the effect for the controller power supply this moment, exports 12V's first voltage to and the second voltage of 9V voltage, and this 12V voltage comes from two windings with 9V voltage, keeps apart completely, gives the control circuit and the communication circuit power supply In the controller respectively.
In the utility model, one end of the input interface is connected with the main loop A, B, C through a wire, any phase is electrified to output normally, and the other end is connected with the current-limiting resistor and the piezoresistor, so that the product has good surge impact resistance; a full-wave rectification circuit composed of a plurality of diodes converts a three-phase alternating current signal into a direct current signal; then smoothing the direct current signal through a filter circuit consisting of a capacitor and a common mode inductor; then, outputting a high-frequency pulse signal to the transformer through the adjusting circuit, and respectively outputting a first voltage and a second voltage by matching the primary winding with the first secondary winding and the second secondary winding; the first voltage and the second voltage may respectively supply power to a control circuit of the circuit breaker and a communication circuit inside thereof.
The utility model discloses in, adopt built-in power supply, can be so that the circuit breaker controller passes through built-in power supply when the undercurrent for the function is more comprehensive, provides stable power basis for voltage protection, earth leakage protection, ground protection, communication function's realization. Compared with the scheme that a transformer is adopted to output one path of power supply and then a DC/DC module is used to output one path of power supply in parallel in the prior art, the scheme that a built-in switching power supply outputs two paths of isolated power supplies saves one DC/DC module, reduces the size and simultaneously reduces the cost. Because the communication circuit is connected with an external upper computer, the communication circuit is possibly influenced by external electromagnetism, lightning stroke, electric shock and the like, and the communication module is burnt. Therefore, the scheme that two windings on the secondary side of the transformer of the switching power supply output two paths of isolated power supplies is adopted, so that the controller circuit of the circuit breaker is completely and electrically isolated from the power supply of the communication module circuit. Even if the communication module is burnt, the controller is not affected and can normally play a protection role.
Claims (7)
1. A circuit breaker device with two built-in power supplies comprises a circuit breaker main loop and is characterized in that the circuit breaker main loop is connected with an input interface of a power supply module, a rectifying circuit, a filtering circuit, an adjusting circuit and a transformer are sequentially connected in the power supply module, an output interface of the transformer is two power supplies, and the two power supplies are mutually electrically isolated and respectively output a first voltage and a second voltage.
2. The circuit breaker device with built-in two-way power supply of claim 1, wherein: the input interface of the power supply module is used for multi-phase power taking and is connected with each circuit of the circuit breaker main loop; each phase is connected with a corresponding current-limiting resistor and a corresponding voltage dependent resistor, any two phases are not powered down, and the power supply can normally output.
3. The circuit breaker device with built-in two-way power supply of claim 1 or 2, characterized in that: the rectification circuit adopts a full-wave rectification circuit consisting of diodes.
4. The circuit breaker device with built-in two-way power supply of claim 1 or 2, characterized in that: the filter circuit comprises a common-mode inductor, a capacitor and a voltage-sharing resistor.
5. The circuit breaker device with built-in two-way power supply of claim 1 or 2, characterized in that: the adjusting circuit adopts a PWM module, and the PWM module outputs a high-frequency pulse signal to the transformer.
6. The circuit breaker device with built-in two-way power supply of claim 5, wherein: the PWM module comprises a power supply circuit and a feedback circuit.
7. The circuit breaker device with built-in two-way power supply of claim 6, wherein: the high-frequency pulse signal enters a primary winding of a transformer through a power supply circuit, the transformer is provided with a first secondary winding and a second secondary winding, and the first secondary winding and the second secondary winding are completely isolated and respectively output a first voltage and a second voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920554538.5U CN210536294U (en) | 2019-04-23 | 2019-04-23 | Circuit breaker device with two built-in power supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920554538.5U CN210536294U (en) | 2019-04-23 | 2019-04-23 | Circuit breaker device with two built-in power supplies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210536294U true CN210536294U (en) | 2020-05-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920554538.5U Active CN210536294U (en) | 2019-04-23 | 2019-04-23 | Circuit breaker device with two built-in power supplies |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210536294U (en) |
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2019
- 2019-04-23 CN CN201920554538.5U patent/CN210536294U/en active Active
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