CN208874475U - A kind of low tension switch power supply for servo-driver - Google Patents
A kind of low tension switch power supply for servo-driver Download PDFInfo
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- CN208874475U CN208874475U CN201821900183.2U CN201821900183U CN208874475U CN 208874475 U CN208874475 U CN 208874475U CN 201821900183 U CN201821900183 U CN 201821900183U CN 208874475 U CN208874475 U CN 208874475U
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Abstract
The utility model relates to servo-driver technical fields, especially a kind of low tension switch power supply for servo-driver, flyback transformer, control circuit including input circuit, multiple groups vice-side winding with EMI filter structure, output circuit and feed circuit with vice-side winding quantity Matching, the control circuit include the control chip of built-in High-frequency MOSFET and PWM controller；And the output end of primary side winding one end connection input circuit, the drain lead of primary side winding other end connection control chip, controls the output end that input circuit is connect by the voltage sense pin of chip；The control pin of the auxiliary winding, the light-receiving device of photo-coupler and control chip is sequentially connected.The utility model uses DC input voitage, while the DPA424 chip high using reverse exciting topological structure and integrated level, and electromagnetic interference is low, requires to reduce to component pressure voltage, reduces power volume, reduces component number, reduce cost.
Description
Technical field
The utility model relates to servo-driver technical field, especially a kind of low tension switch electricity for servo-driver
Source.
Background technique
With the fast development of industry, the servo-driver based on IGBT is widely used in various occasions, and IGBT is general
By multiple power unit cascades or composing in parallel, the power supply of each power cell is exactly a very important core component, it
Energy is provided for driving circuit, control circuit, signal circuit etc., therefore, the quality of power supply determines power cell or even to watching
Take the quality of drive performance.
Input is the servo-driver of 220V or the above alternating current, and the voltage of main circuit unit two sides can reach 500-
600V or higher, and biggish voltage fluctuation is had, need the reliable Switching Power Supply of performance.Reaction type Switching Power Supply has body
The advantages that product is small, multiple-channel output and high cross regulation rate easy to accomplish, is widely used in equipment such as servo-drivers
On.But since input voltage is higher, the component pressure voltage on power supply is also increased accordingly, and the volume of component increases with it, and is led
Driver volume is caused to increase, the production cost increases.
Utility model content
The purpose of this utility model is that the driver switch power supply that existing high-voltage alternating inputs is changed to direct current input
Low tension switch power supply reduces component volume, to reduce the volume of servo-driver, reduces production cost.
The technical solution of the utility model are as follows:
A kind of low tension switch power supply for servo-driver, comprising:
The input circuit of input nonlinearities is inputted and filtered off for external direct current, input circuit is equipped with EMI filter structure, including
DC filter and differential mode capacitor；Flyback transformer, flyback transformer have primary side winding, multiple groups according to different outputs
It is required that and the vice-side winding of coiling and the auxiliary winding for control chip power supply；For circuit of sampling input output voltage from
And the control circuit of pwm signal is generated, control circuit includes the control chip of built-in High-frequency MOSFET and PWM controller；With pair
The output circuit of side winding quantity Matching, the input terminal of output circuit are electrically connected with the output end of vice-side winding；Pass through optical coupling
Device exports the output error feedback of output circuit to the feed circuit for controlling chip, the photophore of photo-coupler with one of
The output end of circuit is electrically connected.
Wherein, the output end of one end connection input circuit of primary side winding, the other end connection control chip of primary side winding
Drain lead, control the output end that input circuit is connect by the voltage sense pin of chip；Auxiliary winding, the light of photo-coupler
The control pin of device and control chip is sequentially connected.
Controlling chip is that DPA424 series controls chip.
Control circuit further includes the other clamp units for being connected to control chip drain lead, clamp units include clamp resistance,
Clamping capacitance and clamp diode, the clamp resistance are connected with clamping capacitance, the clamp diode and clamp resistance, clamp
Capacitor is in parallel.
The control pin of control chip is electrically connected with frequency pin.
The feedback filtering unit for inhibiting AC signal in control pin and frequency pin is connected to by frequency pin, it is described
Feedback filtering unit includes concatenated first feedback filtering capacitor and the first feedback filtering resistance each other, and filters with the first feedback
Second feedback filtering capacitor of wave capacitor, the first feedback filtering resistor coupled in parallel.
The current limliting pin of control chip is connected to the current setting resistor of setting control chip operation current value.
Feed circuit further includes LM431 voltage stabilizing chip, is equipped between the input terminal and output end of the LM431 voltage stabilizing chip
Frequency compensation capacitance and frequency compensation resistance.
Output circuit is equipped with and is made of rectifier diode, load resistance and several filter capacitors.
The utility model has the beneficial effects that electromagnetic interference is low using DC input voitage, component pressure voltage is required to drop
It is low, reduce power volume；DPA424 chip high using reverse exciting topological structure and integrated level simultaneously, reduces number of elements,
Reduce cost.
Detailed description of the invention
Fig. 1: the utility model circuit diagram.
Specific embodiment
To be more clear the objectives, technical solutions, and advantages of the embodiments of the present invention, below in conjunction with attached drawing and reality
Example is applied, the utility model will be further described.
Embodiment
A kind of low tension switch power supply for servo-driver, as shown in Figure 1, include input circuit, flyback transformer,
Control circuit, output circuit and feed circuit.Wherein, the effect of input circuit is that external direct current inputs and filter off input nonlinearities,
Input circuit is equipped with EMI filter structure, including DC filter U1 and the differential mode capacitor being arranged in front of and after DC filter U1
C1,C2；The flyback transformer T have primary side winding, five groups according to different outputs requirement and the vice-side winding of coiling and
For the auxiliary winding of control circuit power supply；The input terminal of output circuit is electrically connected with the output end of vice-side winding, output circuit
Quantity is identical as vice-side winding quantity.
Control circuit generates pwm signal, including built-in High-frequency MOSFET for the output voltage of circuit of sampling input
With the control chip U2 of PWM controller；The control chip U2 of the present embodiment is that DPA424 series controls chip, and pin includes control
Pin (C), voltage sense pin (L), current limliting pin (X), frequency pin (F), source lead (S) and drain lead (D) processed.
Feed circuit is equipped with photo-coupler FOD817, and by photo-coupler FOD817 that the output error of output circuit is anti-
It is fed to control chip U2, the photophore of photo-coupler FOD817 is electrically connected with the output end of one of output circuit, to obtain
Take operating current.
The topological structure of the utility model is designed centered on flyback transformer T, wherein one end of primary side winding connects
The output end of input circuit, the drain lead of the other end connection control chip U2 of primary side winding, controls the voltage detecting of chip
The output end of input circuit is connect by pin (L)；The control of auxiliary winding, the light-receiving device of photo-coupler FOD817 and control chip U2
Pin (C) is sequentially connected.
In order to guarantee peak drain voltage within the acceptable range, control circuit further includes that side is connected to control chip U2 leakage
The clamp units of pole pin (D), clamp units include clamp resistance R5, clamping capacitance C4 and clamp diode D6, the clamp
Resistance R5 connects with clamping capacitance C4, and the clamp diode D6 is in parallel with clamp resistance R5, clamping capacitance C4.Clamp resistance
R5, clamping capacitance C4 absorb excessive drain voltage, and reduce the high-frequency oscillations of voltage between drain electrode (D) and source electrode (S).
Control pin (C) and frequency pin (F) can choose the working frequency of control chip U2, and the present embodiment will be controlled
The control pin (C) of coremaking piece U2 is electrically connected with frequency pin (F), and frequency is 300KHz at this time.
Feed circuit is equipped with the feedback filtering list for inhibiting AC signal on control pin (C) and frequency pin (F)
Member connects on frequency pin (F) by feedback filtering unit, has specifically included the first feedback filtering capacitor EC2, the second feedback filtering
Capacitor C3 and the first feedback filtering resistance R4, wherein the first feedback filtering capacitor EC2 and the first feedback filtering resistance R4 series connection, the
Two feedback filtering capacitor C3 are in parallel with the first feedback filtering capacitor EC2, the first feedback filtering resistance R4.
It is additionally provided with LM431 voltage stabilizing chip on feed circuit, is set between the input terminal and output end of the LM431 voltage stabilizing chip
There are frequency compensation capacitance C12 and frequency compensation resistance R13, guarantees the working environment of photo-coupler FOD817.
Preferably, the current limliting pin of control chip U2 is connected to the electric current setting electricity of setting control chip U2 working current value
Hinder R3, the operating current peak value of the resistance value limitation control chip U2 of current setting resistor.
The quantity of output circuit is five, and each output circuit corresponds to different loads, the voltage output point of output circuit
Not Wei driving circuit and power module power supply+24V output, be relay power supply+24V output, be control panel analog quantity supply
+ the 12V and -12V of electricity are exported, and are the+5V output of control panel power supply.Wherein, the photo-coupler on feed circuit is defeated from+5V
Electricity is taken out.Output circuit be equipped with by rectifier diode (D1-D5), load resistance (R6-R10) and filter capacitor (C7-C11,
EC4-EC7 it) constitutes, the positive and negative values of output voltage depend on the direction of rectifier diode (D1-D5), and above-mentioned -12V output is phase
For reference ground.
Alternating-current switch power supply used in existing servo-driver is changed to the flyback of low-voltage direct input by the utility model
Formula power supply reduces electromagnetic interference and the requirement of component pressure voltage, while using reverse exciting topological structure and integrated level height control
Microarray biochip processed can effectively reduce number of elements and component volume, reduce cost.In servo-driver work, need again
Connection one converts alternating current to the power supply of low-voltage DC, several servo-drivers can connect the same external electricity simultaneously
Source makes full use of electric energy.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, although referring to before
Embodiment is stated the utility model is described in detail, it for those skilled in the art, still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features.In this reality
With in novel description, it is to be understood that term " first ", " second " are used for description purposes only, should not be understood as instruction or
It implies relative importance or implicitly indicates the quantity of indicated technical characteristic.The spy of " first ", " second " is defined as a result,
Sign can explicitly or implicitly include one or more feature.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of low tension switch power supply for servo-driver characterized by comprising
The input circuit of input nonlinearities is inputted and filtered off for external direct current, the input circuit is equipped with EMI filter structure, including
DC filter and differential mode capacitor；
There is primary side winding, multiple groups to be required and the pair of coiling according to different outputs for flyback transformer, the flyback transformer
Side winding and the auxiliary winding powered for control chip；
The control circuit of pwm signal is generated for the output voltage of circuit of sampling input, the control circuit includes built-in
The control chip of High-frequency MOSFET and PWM controller；
With the output circuit of vice-side winding quantity Matching, the input terminal of the output circuit and the output end of vice-side winding are electrically connected
It connects；
The output error feedback of output circuit is extremely controlled to the feed circuit of chip, the hair of the photo-coupler by photo-coupler
Light device is electrically connected with the output end of one of output circuit；
Wherein, the output end of primary side winding one end connection input circuit, the leakage of primary side winding other end connection control chip
Pole pin controls the output end that input circuit is connect by the voltage sense pin of chip；The auxiliary winding, the light of photo-coupler
The control pin of device and control chip is sequentially connected.
2. a kind of low tension switch power supply for servo-driver according to claim 1, it is characterised in that: the control
Chip is that DPA424 series controls chip.
3. a kind of low tension switch power supply for servo-driver according to claim 2, it is characterised in that: the control
Circuit further includes the other clamp units for being connected to control chip drain lead, and clamp units include clamp resistance, clamping capacitance and pincers
Position diode, the clamp resistance are connected with clamping capacitance, and the clamp diode is in parallel with clamp resistance, clamping capacitance.
4. a kind of low tension switch power supply for servo-driver according to claim 2, it is characterised in that: the control
The control pin of chip is electrically connected with frequency pin.
5. a kind of low tension switch power supply for servo-driver according to claim 4, it is characterised in that: the frequency
The feedback filtering unit for inhibiting AC signal in control pin and frequency pin, the feedback filtering unit are connected to by pin
Including concatenated first feedback filtering capacitor each other and the first feedback filtering resistance, and with the first feedback filtering capacitor, first
Second feedback filtering capacitor of feedback filtering resistor coupled in parallel.
6. a kind of low tension switch power supply for servo-driver according to claim 2, it is characterised in that: the control
The current limliting pin of chip is connected to the current setting resistor of setting control chip operation current value.
7. a kind of low tension switch power supply for servo-driver according to claim 1, it is characterised in that: the feedback
Circuit further includes LM431 voltage stabilizing chip, and frequency compensation capacitance is equipped between the input terminal and output end of the LM431 voltage stabilizing chip
With frequency compensation resistance.
8. a kind of low tension switch power supply for servo-driver according to claim 1, it is characterised in that: the output
Circuit is equipped with and is made of rectifier diode, load resistance and several filter capacitors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821900183.2U CN208874475U (en) | 2018-11-16 | 2018-11-16 | A kind of low tension switch power supply for servo-driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821900183.2U CN208874475U (en) | 2018-11-16 | 2018-11-16 | A kind of low tension switch power supply for servo-driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208874475U true CN208874475U (en) | 2019-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821900183.2U Active CN208874475U (en) | 2018-11-16 | 2018-11-16 | A kind of low tension switch power supply for servo-driver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003475A (en) * | 2020-07-15 | 2020-11-27 | 苏州浪潮智能科技有限公司 | Auxiliary converter for PSU (power system unit) of server |
| CN115528901A (en) * | 2022-11-23 | 2022-12-27 | 浙江台邦星普智能科技有限公司 | Servo driver multiplexed output power supply device |
-
2018
- 2018-11-16 CN CN201821900183.2U patent/CN208874475U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003475A (en) * | 2020-07-15 | 2020-11-27 | 苏州浪潮智能科技有限公司 | Auxiliary converter for PSU (power system unit) of server |
| CN112003475B (en) * | 2020-07-15 | 2022-03-22 | 苏州浪潮智能科技有限公司 | Auxiliary converter for PSU (power system unit) of server |
| CN115528901A (en) * | 2022-11-23 | 2022-12-27 | 浙江台邦星普智能科技有限公司 | Servo driver multiplexed output power supply device |
| CN115528901B (en) * | 2022-11-23 | 2023-03-24 | 浙江台邦星普智能科技有限公司 | Servo driver multiplexed output power supply device |
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Address after: 510000 room 701, 7th floor, 34 JINDA street, Liwan District, Guangzhou City, Guangdong Province Patentee after: Guangdong Keyao Intelligent Technology Co.,Ltd. Address before: 510000 room 701, 7th floor, 34 JINDA street, Liwan District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU KOSSI INTELLIGENT TECHNOLOGY Co.,Ltd. |