CN212367164U - Mahjong machine variable frequency speed control circuit - Google Patents
Mahjong machine variable frequency speed control circuit Download PDFInfo
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- CN212367164U CN212367164U CN202021785150.5U CN202021785150U CN212367164U CN 212367164 U CN212367164 U CN 212367164U CN 202021785150 U CN202021785150 U CN 202021785150U CN 212367164 U CN212367164 U CN 212367164U
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Abstract
A frequency conversion and speed regulation circuit of a mahjong machine comprises an isolation transformer, a mahjong machine computer board and a mahjong machine operation panel, wherein the mahjong machine computer board is connected with the mahjong machine operation panel, a frequency converter control circuit comprises a power supply module, a pure sine wave inversion generator chip, an isolation driving module and a single-phase bridge type inversion circuit, a mains supply end is connected with the power supply module, the power supply module is connected with the pure sine wave inversion generator chip, the pure sine wave inversion generator chip is connected with a frequency control end of the mahjong machine computer board, the output side of the pure sine wave inversion generator chip is connected with the input end of the single-phase bridge type inversion circuit through the isolation driving module, the output end of the single-phase bridge type inversion circuit is connected with the primary side of the isolation transformer, and the first output side and the second output side of the secondary side of the isolation transformer are respectively connected with the power end and the control. The utility model discloses simplify structure, high integration, volume are less, are suitable for the volume production.
Description
Technical Field
The utility model relates to a mahjong machine, especially a mahjong machine variable frequency speed governing circuit.
Background
The specification and the model of the existing mahjong machine are more and more, particularly the mainstream trend of a mute machine, the variable frequency speed regulation is a good method, and the existing variable frequency speed regulation circuit board has the technical defects that: the structure is complicated, the parts are scattered, the volume is large, and the method is not suitable for mass production.
The invention content is as follows:
in order to overcome the structure complicacy, part dispersion, bulky, not being fit for the not enough of volume production of current mahjong machine variable frequency speed governing circuit, the utility model provides a mahjong machine variable frequency speed governing circuit simplifies structure, highly integrated, volume less, is suitable for the volume production.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model provides a mahjong machine variable frequency speed control circuit, includes isolation transformer, mahjong machine computer board and mahjong machine operation panel, mahjong machine computer board is connected with mahjong machine operation panel, a serial communication port, variable frequency speed control circuit still includes converter control circuit, converter control circuit includes power module, pure sine wave contravariant generator chip, isolation drive module and single-phase bridge type inverter circuit, the city electric end with power module connects, power module and pure sine wave contravariant generator chip are connected, pure sine wave contravariant generator chip is connected with the frequency control end of mahjong machine computer board, the output side of pure sine wave contravariant generator chip is connected with single-phase bridge type inverter circuit's input through isolation drive module, single-phase bridge type inverter circuit's output with isolation transformer's former limit is connected, the first output side, the second output side of isolation transformer's vice limit, The second output side is respectively connected with the power supply end and the control end of the computer board of the mahjong machine.
Furthermore, two SPWM1 and SPWM2 waveform output ends of the pure sine wave inversion generator chip are respectively connected with the input end of the single-phase bridge type inversion circuit through the isolation driving module.
In the scheme, the frequency conversion circuit module is added at the primary end of the main circuit transformer, so that the motor of the mahjong machine can be regulated in a stepless or stepped manner.
The beneficial effects of the utility model are that: the frequency conversion speed regulation circuit with high integration is realized, the structure is simplified, the high integration is realized, the size is small, and the frequency conversion speed regulation circuit is suitable for mass production.
Drawings
FIG. 1 is a schematic block diagram of a frequency conversion speed regulation circuit of a mahjong machine.
FIG. 2 is an electrical schematic diagram of a frequency conversion speed regulation circuit of a mahjong machine.
Fig. 3 is a circuit diagram of fig. 1.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 3, a frequency conversion and speed regulation circuit of a mahjong machine comprises an isolation transformer, a computer board of the mahjong machine and an operation panel of the mahjong machine, wherein the computer board of the mahjong machine is connected with the operation panel of the mahjong machine, the frequency conversion and speed regulation circuit further comprises a frequency converter control circuit, the frequency converter control circuit comprises a power module, a pure sine wave inversion generator chip, an isolation driving module and a single-phase bridge type inversion circuit, a commercial power end is connected with the power module, the power module is connected with the pure sine wave inversion generator chip, the pure sine wave inversion generator chip is connected with a frequency control end of the computer board of the mahjong machine, an output side of the pure sine wave inversion generator chip is connected with an input end of the single-phase bridge type inversion circuit through the isolation driving module, an output end of the bridge type single-phase inversion circuit is connected with a primary side of the isolation transformer, and the first output side and the second output side of the secondary side of the isolation transformer are respectively connected with the power supply end and the control end of the computer board of the mahjong machine.
Furthermore, two SPWM1 and SPWM2 waveform output ends of the pure sine wave inversion generator chip are respectively connected with the input end of the single-phase bridge type inversion circuit through the isolation driving module.
In the embodiment, the pure sine wave inversion generator chip obtains two SPWM1 and SPWM2 waveforms, then drives 4 IGBT elements in a single-phase bridge type inversion circuit through two isolation driving modules, V1-V4 are four switches of the bridge type inversion circuit, the two isolation driving modules of a controllable switch are used for respectively controlling the on-off of V1-V4, the current direction is switched, direct current is converted into alternating current, finally, an output unidirectional frequency modulation power supply is connected with the primary side of an isolation transformer through an LC low-frequency filter, and the secondary side of the isolation transformer is connected with a computer board of a mahjong machine; therefore, the unidirectional frequency modulation power supply can be provided for the computer board of the mahjong machine and also can provide a variable-frequency power supply for the synchronous motor group so as to achieve different rotating speeds of the control motors with different frequencies.
Claims (2)
1. The utility model provides a mahjong machine variable frequency speed control circuit, includes isolation transformer, mahjong machine computer board and mahjong machine operation panel, mahjong machine computer board is connected with mahjong machine operation panel, a serial communication port, variable frequency speed control circuit still includes converter control circuit, converter control circuit includes power module, pure sine wave contravariant generator chip, isolation drive module and single-phase bridge type inverter circuit, the city electric end with power module connects, power module and pure sine wave contravariant generator chip are connected, pure sine wave contravariant generator chip is connected with the frequency control end of mahjong machine computer board, the output side of pure sine wave contravariant generator chip is connected with single-phase bridge type inverter circuit's input through isolation drive module, single-phase bridge type inverter circuit's output with isolation transformer's former limit is connected, the first output side, the second output side of isolation transformer's vice limit, The second output side is respectively connected with the power supply end and the control end of the computer board of the mahjong machine.
2. The frequency-conversion speed-regulation circuit of a mahjong machine as claimed in claim 1, wherein two SPWM1 and SPWM2 waveform output ends of the pure sine wave inversion generator chip are respectively connected with the input end of the single-phase bridge type inversion circuit through the isolation driving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021785150.5U CN212367164U (en) | 2020-08-24 | 2020-08-24 | Mahjong machine variable frequency speed control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021785150.5U CN212367164U (en) | 2020-08-24 | 2020-08-24 | Mahjong machine variable frequency speed control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212367164U true CN212367164U (en) | 2021-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021785150.5U Active CN212367164U (en) | 2020-08-24 | 2020-08-24 | Mahjong machine variable frequency speed control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212367164U (en) |
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2020
- 2020-08-24 CN CN202021785150.5U patent/CN212367164U/en active Active
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