CN205544245U - Refrigerator controller with surge current controlling resistance controllability - Google Patents
Refrigerator controller with surge current controlling resistance controllability Download PDFInfo
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- CN205544245U CN205544245U CN201620108668.2U CN201620108668U CN205544245U CN 205544245 U CN205544245 U CN 205544245U CN 201620108668 U CN201620108668 U CN 201620108668U CN 205544245 U CN205544245 U CN 205544245U
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Abstract
The utility model relates to a refrigerator controller with surge current controlling resistance controllability, including surge current inhibitor, filter capacitance, H bridge drive circuit, H bridge circuit and control circuit, control circuit's output termination H bridge drive circuit's input, H bridge drive circuit's output termination the input of H bridge circuit, the output termination refrigerator of H bridge circuit, the surge current inhibitor includes parallel connection's thermistor and switch K1 and switch drive circuit, switch drive circuit's a termination control circuit's output, another termination switch K1, thermistor, one of which termination power, its another termination H bridge circuit. The utility model discloses can solve exist among the prior art not enough, reduce controller power consumption, improve the conversion efficiency and the reliability of controller.
Description
Technical field
This utility model relates to sterlin refrigerator technical field, is specifically related to a kind of refrigerating device controller with Inrush current restraining resistance controllability.
Background technology
The motor static state coil resistance smaller (less than 1 ohm) of sterlin refrigerator, in several milliseconds that begin to turn on power supply, motor is static, tens volts of voltages are added on coil, have the biggest surge current to flow through, this can cause damage to refrigeration machine and driving controller circuitry, the most directly burns circuit and motor coil.It addition, in power on moment, the electric capacity charging in controller, also can produce surge current, and capacitor's capacity is the biggest, surge current is the biggest.At present, generally use common critesistor to carry out surge current suppression, but use common critesistor can consume a lot of merit, and these merits can change into and be thermally conducted in controller, make controller temperature rise big, unfavorable to controller performance.Therefore, in order to ensure that controller can work by clean boot refrigeration machine, and too many merit is not lost, it is necessary to design the controlled surge restraint circuit of a kind of resistance and be serially connected in controller power source bus bar circuit.
Utility model content
The purpose of this utility model is to provide a kind of refrigerating device controller with Inrush current restraining resistance controllability, surge current suppression circuit can solve the problem that the deficiencies in the prior art, reduce controller power attenuation, improve conversion efficiency and the reliability of controller.
For achieving the above object, this utility model have employed techniques below scheme:
A kind of refrigerating device controller with Inrush current restraining resistance controllability, including Inrush current restraining device, H-bridge drive circuit, H-bridge circuit and control circuit；The output of described control circuit terminates the input of described H-bridge drive circuit；The output of described H-bridge drive circuit terminates the input of described H-bridge circuit；The output termination refrigeration machine of described H-bridge circuit；Described Inrush current restraining device includes critesistor and switch K1 and the switch driving circuit being connected in parallel；The outfan of the one described control circuit of termination of described switch driving circuit, another termination switch K1；Described critesistor, one termination power, its another termination H-bridge circuit.
Further, described critesistor connects the most filtered capacity earth in one end of H-bridge circuit.
Further, described H-bridge circuit includes switch K2 Yu K3 being connected in series and switch K4 and K5 being connected in series；The branch road that switch K2 Yu K3 being connected in series is formed, the branch road formed with switch K4 with K5 being connected in series is in parallel.
From above technical scheme, this utility model can overcome the deficiency that the critesistor consumed work in existing stirling refrigeration machine controller is more, this utility model is by parallel with switch K1 by critesistor, and control switch on and off, the resistance of Inrush current restraining resistance is controlled, the power attenuation of controller can be reduced, it is to avoid controller temperature is too high, improves controller conversion efficiency (bringing up to 90% from 85%) and reliability.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Wherein:
1, Inrush current restraining device, 2, filter capacitor, 3, H-bridge drive circuit, 4, H-bridge circuit, 5, control circuit, 6, refrigeration machine.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further:
A kind of refrigerating device controller with Inrush current restraining resistance controllability as shown in Figure 1, including Inrush current restraining device 1, filter capacitor 2, H-bridge drive circuit 3, H-bridge circuit 4 and control circuit 5.The output of described control circuit 5 terminates the input of described H-bridge drive circuit 3.The output of described H-bridge drive circuit 3 terminates the input of described H-bridge circuit 4.The input of the output termination refrigeration machine 6 of described H-bridge circuit 4.Described Inrush current restraining device 1 includes critesistor and switch K1 and the switch driving circuit being connected in parallel.The outfan of the one described control circuit 5 of termination of described switch driving circuit, another termination switch K1.Described critesistor, one termination power DC, its another termination H-bridge circuit 4.Described critesistor connects one end the most filtered electric capacity 2 ground connection of H-bridge circuit 4.
Further, described H-bridge circuit 4 includes switch K2 Yu K3 being connected in series and switch K4 and K5 being connected in series；The branch road that switch K2 Yu K3 being connected in series is formed, the branch road formed with switch K4 with K5 being connected in series is in parallel.
Operation principle of the present utility model is:
Control circuit 5 sends the switch K2-K5 work to H bridge predrive circuit 3, after H-bridge drive circuit 3 carries out power amplification, in driving H-bridge circuit 4 of the dutycycle adjustable pwm pulse, it is achieved DC-AC inversion, and final driving refrigeration machine 6 works.Described Inrush current restraining device 1 suppresses for refrigeration machine starts surge current on instantaneous power bus.The disturbing pulse caused on power supply DC bus when described filter capacitor 2 is for filtering the switch on and off of H-bridge circuit.
Described Inrush current restraining device plays starting protection effect in whole refrigeration machine drives controller.Surge current suppression circuit described in the utility model, by adjusting the resistance of Surge suppression resistance (i.e. critesistor) so that it is different in different periods resistance, thus while to Inrush current restraining, additionally it is possible to reduce the power consumption driving controller.Specifically, starting the moment of power supply DC, owing to the static coil resistance of refrigeration machine 6 is little, filter capacitor 2 needs charging, therefore, the bus of power supply DC can flow through the biggest surge current.Signal is sent to switch driving circuit by the switch control module of control circuit 5, the switch driving circuit output low level in Inrush current restraining device 1, switch K1 is made to be off, now, critesistor is serially connected in the bus bar circuit of power supply DC, plays the effect of surge current suppression.nullAlong with the coil generating electromagnetic of refrigeration machine 6 senses，Refrigeration machine 6 runs to slow from static，Cutting magnetic line movement made by coil，The induced current contrary with the sense of current can be produced，Simultaneously，The motor feels hot and power line heating makes circuit impedance increase，Filter capacitor 2 charges complete，Now，Surge current on power supply DC bus can rapid decrement，Until it is stable，After surge current on power source bus is stable，Switch control module in control circuit 5 sends signal to switch driving circuit，Make the switch driving circuit output high level in Inrush current restraining device，Drive switch K1 Guan Bi，Critesistor is in parallel with the switch K1 of Guan Bi，Now，The internal resistance in power source bus loop is greatly reduced，It is thus possible to reduce the power attenuation of controller，Controller temperature is avoided to raise，Efficiency and the reliability of controller are greatly improved.
In sum, a kind of refrigerating device controller with Inrush current restraining resistance controllability described in the utility model, DC level inversion is exchange level by this controller, drives and controls refrigeration machine work.The Inrush current restraining of existing stirling refrigeration machine controller typically uses critesistor, critesistor resistance is bigger, when flowing through its electric current and increasing, critesistor consumed work is more, and being converted into and be thermally conducted in controller, these heats directly cause controller temperature to raise, and cause controller performance to decline, even damaging, controller conversion efficiency is relatively low simultaneously.And surge current suppression circuit described in the utility model; by adjusting the resistance of Surge suppression resistance (i.e. critesistor); make them different in different periods resistance; this not only solves sterlin refrigerator and starts transient protection problem; also significantly reduce power attenuation in sterlin refrigerator work process; improve the protective value of stirling refrigeration machine controller, improve the conversion efficiency of controller.
Embodiment described above is only to be described preferred implementation of the present utility model; not scope of the present utility model is defined; on the premise of without departing from this utility model design spirit; various deformation that the technical solution of the utility model is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that this utility model claims determine.
Claims (3)
1. a refrigerating device controller with Inrush current restraining resistance controllability, it is characterised in that: include Inrush current restraining device, H-bridge drive circuit, H-bridge circuit and control circuit；The output of described control circuit terminates the input of described H-bridge drive circuit；The output of described H-bridge drive circuit terminates the input of described H-bridge circuit；The output termination refrigeration machine of described H-bridge circuit；Described Inrush current restraining device includes critesistor and switch K1 and the switch driving circuit being connected in parallel；The outfan of the one described control circuit of termination of described switch driving circuit, another termination switch K1；Described critesistor, one termination power, its another termination H-bridge circuit.
A kind of refrigerating device controller with Inrush current restraining resistance controllability the most according to claim 1, it is characterised in that: described critesistor connects the most filtered capacity earth in one end of H-bridge circuit.
A kind of refrigerating device controller with Inrush current restraining resistance controllability the most according to claim 1, it is characterised in that: described H-bridge circuit includes switch K2 Yu K3 being connected in series and switch K4 and K5 being connected in series；The branch road that switch K2 Yu K3 being connected in series is formed, the branch road formed with switch K4 with K5 being connected in series is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620108668.2U CN205544245U (en) | 2016-02-03 | 2016-02-03 | Refrigerator controller with surge current controlling resistance controllability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620108668.2U CN205544245U (en) | 2016-02-03 | 2016-02-03 | Refrigerator controller with surge current controlling resistance controllability |
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| CN205544245U true CN205544245U (en) | 2016-08-31 |
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| CN201620108668.2U Active CN205544245U (en) | 2016-02-03 | 2016-02-03 | Refrigerator controller with surge current controlling resistance controllability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206511A (en) * | 2016-12-19 | 2018-06-26 | 发那科株式会社 | Surge current prevents circuit and its prevention method, computer-readable recording medium |
-
2016
- 2016-02-03 CN CN201620108668.2U patent/CN205544245U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206511A (en) * | 2016-12-19 | 2018-06-26 | 发那科株式会社 | Surge current prevents circuit and its prevention method, computer-readable recording medium |
| CN108206511B (en) * | 2016-12-19 | 2019-07-09 | 发那科株式会社 | Surge current prevents circuit and its prevention method, computer-readable recording medium |
| US10355474B2 (en) | 2016-12-19 | 2019-07-16 | Fanuc Corporation | Inrush current prevention circuit, inrush current prevention method, and computer readable medium |
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