CN203482112U - Conditioning circuit driven by PWM drive motor power converter switch tube - Google Patents
Conditioning circuit driven by PWM drive motor power converter switch tube Download PDFInfo
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- CN203482112U CN203482112U CN201320590908.3U CN201320590908U CN203482112U CN 203482112 U CN203482112 U CN 203482112U CN 201320590908 U CN201320590908 U CN 201320590908U CN 203482112 U CN203482112 U CN 203482112U
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- pwm signal
- pwm
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Abstract
A conditioning circuit driven by PWM drive motor power converter switch tubes comprises a PWM signal input end which inputs a PWM signal of a drive switch tube switch; the PWM signal input end is respectively connected with a D trigger and a double-input and NAND-gate logic integrated circuit; the D trigger is connected with the double-input and NAND-gate logic integrated circuit; the double-input and NAND-gate logic integrated circuit is provided with two ways of PWM signal output ends whose frequencies are the same and whose phase angles differ less than one cycle; and the PWM signal output ends are respectively connected with two switch tubes in serial connection with windings on the motor power converter. The conditioning circuit driven by PWM drive motor power converter switch tubes has the advantages that phenomena that the power supply is instantly short-circuited and current or voltage shocks in the branch can be avoided, the excessively long circuit dead zone time does not exist, and the circuit is suitable for conventional motor PWM speed regulation system application.
Description
Technical field
The utility model relates to the modulate circuit that a kind of PWM drive motors power inverter switching tube drives.
Background technology
Between main power source and ground connection two ends, if only there is a switch and a set of winding, this class circuit is unsafe so, if two switches are all connected with windings in series, to make switch motion be also dangerous to two switches simultaneously so, same also causes power supply short circuit in short-term and electric current intense impact opening moment, voltge surge during shutoff, therefore,, if run into the above circuit form, be necessary to take certain method to evade this risk.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, to have avoided power supply short circuit be the modulate circuit that the PWM drive motors power inverter switching tube of the impact phenomenon that occurs drives.
For reaching goal of the invention the technical solution adopted in the utility model, be:
The modulate circuit that a kind of PWM drive motors power inverter switching tube drives, it is characterized in that: the pwm signal input that comprises the pwm signal of an input driving switch pipe switch, described pwm signal input is connected with dual input NAND gate logical integrated circuit with d type flip flop respectively, described d type flip flop is connected with dual input NAND gate logical integrated circuit, described dual input NAND gate logical integrated circuit is provided with two-way frequency same phase angle and differs the pwm signal output that is less than one-period, described pwm signal output is connected with two switching tubes of windings in series respectively with on power of motor converter.
The pwm signal of pwm signal input input of the present utility model is first through d type flip flop, then through the two-way pwm signal output of dual input NAND gate logical integrated circuit, export the new PWM output signal of two-way, the new PWM output signal of two-way except phase shifting certain angle that is less than its one-period, all the other are the same, they are compared with pwm signal, and frequency has reduced by one times.The purpose of this utility model is need to open simultaneously or disconnect when being in two switching tubes of connecting between supply voltage and ground connection; when opening or disconnecting the motor winding of connecting with them; in order to prevent the switch curtage impact phenomenon of moment; protection power source and switching tube; therefore allow the driving signal of two switching tubes certain phase angle of staggering, but general effect is also constant.And the phase angle that staggers of the new PWM output signal of two-way is lower than the pulse of one-period, such switching tube opens that not need to wait as long for another switching tube open-minded, can not cause the control rate of motor to reduce, it is also little that switching tube bears pressure, there is not obvious dead band, be beneficial to the runnability of motor.
The beneficial effects of the utility model: avoided power supply occur moment short circuit and branch road on electric current or voltge surge phenomenon, there is not long circuit Dead Time yet, be suitable for the application of conventional motor PWM governing system.
Accompanying drawing explanation
Fig. 1 is the structural representation of circuit of the present utility model.
Fig. 2 is a typical asymmetrical half-bridge type power inverter main circuit of the present utility model.
Fig. 3 is single-input double-output San of the present utility model road pwm signal oscillogram.
Embodiment
Below in conjunction with specific embodiment, the utility model is further described, but the utility model is not confined to these embodiments.One skilled in the art would recognize that the utility model contained all alternatives, improvement project and the equivalents that within the scope of claims, may comprise.
With reference to Fig. 1, the modulate circuit that a kind of PWM drive motors power inverter switching tube drives, the pwm signal input that comprises the pwm signal of an input driving switch pipe switch, described pwm signal input is connected with dual input NAND gate logical integrated circuit U2 with d type flip flop U1 respectively, described d type flip flop U1 is connected with dual input NAND gate logical integrated circuit U2, described dual input NAND gate logical integrated circuit U2 is provided with two-way frequency same phase angle and differs the pwm signal output that is less than one-period, described pwm signal output is connected with two switching tubes of windings in series respectively with on power of motor converter.
The pwm signal PWM of pwm signal input input of the present utility model is first through d type flip flop U1, then through the two-way pwm signal output of dual input NAND gate logical integrated circuit U2, export new PWM output signal PWM1, the PWM2 of two-way, new PWM output signal PWM1, the PWM2 of two-way except phase shifting certain angle that is less than its one-period, all the other are the same, they are compared with pwm signal, frequency has reduced by one times, as shown in Figure 3.The purpose of this utility model is need to open simultaneously or disconnect when being in two switching tubes of connecting between supply voltage and ground connection; when opening or disconnecting the motor winding of connecting with them; in order to prevent the switch curtage impact phenomenon of moment; protection power source and switching tube; therefore allow the driving signal of two switching tubes certain phase angle of staggering, but general effect is constant.And the new PWM output signal PWM1 of two-way, phase angle that PWM2 staggers are lower than the pulse of one-period, such switching tube opens that not need to wait as long for another switching tube open-minded, can not cause the control rate of motor to reduce, it is also little that switching tube bears pressure, there is not obvious dead band, be beneficial to the runnability of motor.
Figure 2 shows that the power inverter main circuit of the present embodiment, take A phase winding as example, T1, two switching tubes of T2 are connected with winding A, upper and lower two ends are main power source Us, PWM1 and PWM2 drive respectively T1 and T2, if the waveform that PWM1 and PWM2 are same, drives T1 and T2 simultaneously, certainly will cause rush of current even to burn power-supply device and T1, two switching tubes of T2 starting moment; Therefore the PWM1 in the present embodiment and PWM2 are that frequency same phase angle differs and is less than one-period two-way and drives signal; avoided power supply occur moment short circuit and branch road on electric current or voltge surge phenomenon; protect power-supply device and T1, two switching tubes of T2, also do not had long circuit Dead Time.This example has only drawn the wherein modulate circuit of a power inverter branch road, and all the other are the same.
Claims (1)
1. the modulate circuit that a PWM drive motors power inverter switching tube drives, it is characterized in that: the pwm signal input that comprises the pwm signal of an input driving switch pipe switch, described pwm signal input is connected with dual input NAND gate logical integrated circuit with d type flip flop respectively, described d type flip flop is connected with dual input NAND gate logical integrated circuit, described dual input NAND gate logical integrated circuit is provided with two-way frequency same phase angle and differs the pwm signal output that is less than one-period, described pwm signal output is connected with two switching tubes of windings in series respectively with on power of motor converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590908.3U CN203482112U (en) | 2013-09-23 | 2013-09-23 | Conditioning circuit driven by PWM drive motor power converter switch tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320590908.3U CN203482112U (en) | 2013-09-23 | 2013-09-23 | Conditioning circuit driven by PWM drive motor power converter switch tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203482112U true CN203482112U (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320590908.3U Expired - Fee Related CN203482112U (en) | 2013-09-23 | 2013-09-23 | Conditioning circuit driven by PWM drive motor power converter switch tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203482112U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300932A (en) * | 2016-10-14 | 2017-01-04 | 杭州派尼澳电子科技有限公司 | A kind of programmable single channel pwm signal precision Dead Time inserts circuit |
| WO2017063896A1 (en) * | 2015-10-13 | 2017-04-20 | Conti Temic Microelectronic Gmbh | Method and circuit arrangement for operating at least one semiconductor switch, method, and power converter for operating an electric machine |
| CN109030030A (en) * | 2018-08-16 | 2018-12-18 | 杭州容大智造科技有限公司 | A kind of device and method using current detecting suspension |
-
2013
- 2013-09-23 CN CN201320590908.3U patent/CN203482112U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017063896A1 (en) * | 2015-10-13 | 2017-04-20 | Conti Temic Microelectronic Gmbh | Method and circuit arrangement for operating at least one semiconductor switch, method, and power converter for operating an electric machine |
| CN106300932A (en) * | 2016-10-14 | 2017-01-04 | 杭州派尼澳电子科技有限公司 | A kind of programmable single channel pwm signal precision Dead Time inserts circuit |
| CN109030030A (en) * | 2018-08-16 | 2018-12-18 | 杭州容大智造科技有限公司 | A kind of device and method using current detecting suspension |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140923 |
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| EXPY | Termination of patent right or utility model |