CN110611466A - Pulse trigger board of voltage and speed regulating system - Google Patents
Pulse trigger board of voltage and speed regulating system Download PDFInfo
- Publication number
- CN110611466A CN110611466A CN201910856565.2A CN201910856565A CN110611466A CN 110611466 A CN110611466 A CN 110611466A CN 201910856565 A CN201910856565 A CN 201910856565A CN 110611466 A CN110611466 A CN 110611466A
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- circuit
- voltage
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- synchronous
- trigger
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
- H02P7/2913—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a pulse trigger board of a voltage-regulating and speed-regulating system, which comprises a voltage conversion circuit, a direction signal conversion circuit, a synchronous voltage signal and speed given signal combination circuit, a direction enable signal and synchronous voltage signal oscillation circuit, a pulse trigger circuit of a synchronous transformer and an external wiring terminal, wherein the voltage conversion circuit receives power supply voltage, converts the power supply voltage and outputs the converted power supply voltage to a main control board interface and the synchronous voltage signal and speed given signal combination circuit respectively. The pulse trigger plate for the voltage and speed regulating system effectively reduces the failure rate of the existing voltage and speed regulating system in the operation process, and meanwhile, the circuit part adopts a plug terminal, so that the installation and the replacement are more convenient.
Description
Technical Field
The invention relates to a trigger plate, in particular to a pulse trigger plate of a voltage and speed regulating system.
Background
The voltage regulation and speed regulation means that the terminal voltage of the motor is regulated to realize stepless speed regulation of the motor in a certain rotating speed range. The advantage is that the motor operates steadily in the whole speed regulating range. The speed regulation range is also the largest, and the starting voltage of the motor can be regulated to the rated voltage; the PWM speed regulation has the advantages of high efficiency and continuous speed regulation range, and has the disadvantages of pulsation, increased noise and more serious load when the motor runs at the lowest rotating speed.
The circuit board of the existing operating voltage-regulating and speed-regulating system is old, the failure rate is high, the spare parts are difficult to purchase and maintain, the replacement exists in use, the detection is inconvenient, and the circuit board is easy to damage in the transportation process. Therefore, technology updating is needed, and the method can be better suitable for field application.
Disclosure of Invention
The invention aims to provide a pulse trigger board of a voltage and speed regulating system, which aims to solve the problems in the background technology.
In order to realize the purpose, the invention provides the following technical scheme:
a pulse trigger board of a voltage-regulating and speed-regulating system comprises a voltage conversion circuit, a direction signal conversion circuit, a synchronous voltage signal and speed given signal combination circuit, a direction enable signal and synchronous voltage signal oscillation circuit, a pulse trigger circuit of a synchronous transformer and an external wiring terminal, wherein the voltage conversion circuit receives power supply voltage, converts the power supply voltage and outputs the converted power supply voltage to a main control board interface and the synchronous voltage signal and speed given signal combination circuit respectively, the main control board interface is also connected with the direction signal conversion circuit respectively and completes communication with a main control board, the main control board interface also outputs a direction enable signal to the direction enable signal and synchronous voltage signal oscillation circuit, the main control board interface also outputs a speed given signal to the synchronous voltage signal and speed given signal combination circuit, and the input end of the synchronous voltage signal and speed given signal combination circuit is also connected with the synchronous voltage signal conversion circuit, the output end of the synchronous voltage signal and speed given signal combination circuit is connected with a direction enabling signal and synchronous voltage signal oscillating circuit, and the direction enabling signal and synchronous voltage signal oscillating circuit is also connected with a pulse trigger circuit of a synchronous transformer.
As a still further scheme of the invention: the fault detection circuit is connected with the temperature control circuit and outputs a fault signal to the main control board interface, the fault detection circuit detects a main loop power supply and temperature control detection, and the main loop power supply detects a phase failure and a phase sequence.
As a still further scheme of the invention: the direction enable signal and synchronizing voltage signal oscillating circuit includes an oscillating circuit LT1, an oscillating circuit LT2, an oscillating circuit LT3, an oscillating circuit LT4, and an oscillating circuit LT 5.
As a still further scheme of the invention: the pulse trigger circuit of the synchronous transformer comprises a pulse transformer, a trigger circuit LT1, a trigger circuit LT2, a trigger circuit LT3, a trigger circuit LT4 and a trigger circuit LT 5.
As a still further scheme of the invention: the input voltage of the voltage conversion circuit is 24VDC, and the output voltage is 15 VDC.
As a still further scheme of the invention: the synchronous voltage signal conversion circuit collects three-phase synchronous voltage, six synchronous pulses are generated after passing through a composition comparison circuit of the operational amplifier, the synchronous pulses are converted into trapezoidal wave negative voltage signals after waveform conversion, and the trapezoidal wave negative voltage signals are compared with given speed positive voltage signals output by the main control board to generate six trigger pulses.
As a still further scheme of the invention: the trigger circuit LT1, the trigger circuit LT2, the trigger circuit LT3, the trigger circuit LT4 and the trigger circuit LT5 have the same structure and are all silicon controlled rectifier trigger circuits, pulse trigger signals are isolated by a pulse transformer, and output pulses on the secondary side trigger the conduction of silicon controlled rectifiers.
As a still further scheme of the invention: the interface circuit of the main control board adopts a 20-pin terminal, is connected by a flat cable, sends a power supply and a fault signal to the main control board, and receives a direction signal, an enabling signal and a speed signal of the main control board.
Compared with the prior art, the invention has the beneficial effects that: the pulse trigger plate for the voltage and speed regulating system effectively reduces the failure rate of the existing voltage and speed regulating system in the operation process, and meanwhile, the circuit part adopts a plug terminal, so that the installation and the replacement are more convenient.
Drawings
FIG. 1 is a system architecture diagram of the present invention;
FIG. 2 is a voltage conversion circuit diagram;
FIG. 3 is a fault detection circuit diagram;
FIG. 4 is a circuit diagram of a synchronous voltage conversion circuit;
FIG. 5 is a waveform diagram of a transition sync pulse;
FIG. 6 is a circuit diagram of comparison of a trapezoidal synchronous voltage signal with a given speed;
FIG. 7 is a circuit diagram of trigger pulse synthesis;
FIG. 8 is a circuit diagram of direction switching;
FIG. 9 is a circuit diagram of a direction, enable signal synthesis;
FIG. 10 is a schematic diagram of a pulse oscillation circuit LT 1;
FIG. 11 is a schematic diagram of a pulse oscillation trigger circuit LT 2;
FIG. 12 is a schematic diagram of a pulse trigger circuit LT 4;
FIG. 13 is a schematic diagram of a pulse oscillation circuit LT 5;
FIG. 14 is a schematic diagram of a thyristor trigger circuit L1-T1;
FIG. 15 is a schematic diagram of thyristor trigger current L1-T3;
FIG. 16 is a schematic diagram of thyristor trigger current L2-T2;
FIG. 17 is a schematic diagram of thyristor trigger current L3-T3;
FIG. 18 is a schematic diagram of a thyristor trigger circuit L3-T1;
FIG. 19 is a connection diagram of thyristors;
FIG. 20 is a circuit diagram of an interface with a main control board;
FIG. 21 is an input circuit diagram of an external power supply;
FIG. 22 is a negative voltage generating circuit diagram;
fig. 23 is a schematic diagram of the pulse trigger circuit LT 3.
FIG. 24 is a main loop sampling circuit diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: referring to fig. 1-24, to achieve the above object, the present invention provides the following technical solutions:
a pulse trigger board of a voltage-regulating and speed-regulating system comprises a voltage conversion circuit, a direction signal conversion circuit, a synchronous voltage signal and speed given signal combination circuit, a direction enable signal and synchronous voltage signal oscillation circuit, a pulse trigger circuit of a synchronous transformer and an external wiring terminal, wherein the voltage conversion circuit receives power supply voltage, converts the power supply voltage and outputs the converted power supply voltage to a main control board interface and the synchronous voltage signal and speed given signal combination circuit respectively, the main control board interface is also connected with the direction signal conversion circuit respectively and completes communication with a main control board, the main control board interface also outputs a direction enable signal to the direction enable signal and synchronous voltage signal oscillation circuit, the main control board interface also outputs a speed given signal to the synchronous voltage signal and speed given signal combination circuit, and the input end of the synchronous voltage signal and speed given signal combination circuit is also connected with the synchronous voltage signal conversion circuit, the output end of the synchronous voltage signal and speed given signal combination circuit is connected with a direction enabling signal and synchronous voltage signal oscillating circuit, and the direction enabling signal and synchronous voltage signal oscillating circuit is also connected with a pulse trigger circuit of a synchronous transformer. Specifically, referring to the overall block diagram of the circuit board, fig. 1 shows the logical relationship between modules.
In the production of power supply voltage, a control circuit needs +/-15V voltage, and only 24V power supply voltage is supplied from the outside, so that voltage conversion is needed. As shown in fig. 2, a voltage of 24V produces a voltage of 15V through LM 7815. Then the +15V voltage passes through the oscillating circuit and the transformer, as shown in figure 22, the oscillating circuit is composed of a capacitor, a resistor, a diode, a triode and the transformer, the transformer is three coils, the turn ratio is 1:1:1, +15 provides the oscillator to provide the power supply voltage, and after the 15V power supply is switched on, the oscillator is started. The amplitude of the oscillation of the upper voltage of the coil is 15V, the oscillation is rectified by a diode, the positive voltage is cut off, and the negative 15V voltage is generated after filtering.
And fault detection, wherein the fault detection comprises detection of a main loop power supply and temperature control detection, the temperature control detection is carried out according to an external temperature control switch, the temperature control switch is closed under a normal condition, and is disconnected when the temperature is too high, for example, FA in the figure 3 is a temperature measuring element of the temperature control switch, and is disconnected when the temperature is too high. The open-phase and phase-sequence detection firstly converts the voltage of a main loop to produce a level which is suitable for a control circuit, the voltage of the three-phase main loop is subjected to resistance voltage division to produce three-phase synchronous voltages PL1, PL2 and PL3 with the amplitude of 15V, the three-phase synchronous voltages are checked by an open-phase and phase-sequence check circuit, a low level is normally output, a high level is output if the three-phase synchronous voltages are abnormal, and a fault lamp is on.
The three-phase synchronous voltage passes through an operational amplifier to form a comparison circuit to generate six synchronous pulses, as shown in fig. 4, the synchronous voltages L1 and L2 pass through the comparison circuit to generate two paths of oscillation pulses with opposite phases of L1-L2 and L2-L1. Similarly, the synchronous voltages L1 and L3 can generate two paths of pulses of L1-L3 and L3-L1 through a comparison circuit of an operational amplifier; l2 and L3 can generate two-way pulses of L2-L3 and L3-L2.
The square wave pulses are subjected to waveform conversion, as shown in fig. 5, when the square wave pulses of L1-L2 are negative level-14V, the diode is conducted, the capacitor is discharged through the 1K resistor, and voltage of-14V is output; when the voltage is positive, the diode is cut off, the capacitor is charged by the two resistors connected with the +15 power supply, because the resistance value of the charging resistor is large, the charging is slow, the TL1-L2 and-14V gradually rise to 0V, at the moment, the positive level is converted into the negative level, the capacitor is rapidly discharged to-14V again, and therefore the TL1-L2 are trapezoidal waves of negative voltage. Similarly, L2-L1, L2-L3, L3-L2, L3-L1 and L1-L3 can be changed into trapezoidal waves.
Such a trapezoidal wave negative voltage signal is compared with a given speed positive voltage signal SU, which is a speed given signal output by the main control board as shown in fig. 6. The output is high when the SU amplitude is greater than the TL1-L2 amplitude, otherwise it is low. The trigger pulse thus generated is associated with a given SU, and the greater the amplitude of the given SU, the more advanced the timing of the trigger pulse PL1-L2 to output a high level, and the smaller the conduction angle. The same principle can generate six trigger pulses of trigger pulses PL2-L1, PL2-L3, PL3-L2, PL3-L1 and PL 1-L3.
Trigger pulses are generated synthetically, as shown in FIG. 7, PL1-L2 and PL3-L2 produce trigger pulse-L2, and trigger pulses + L2, -L1, + L1, -L3 and + L3 can be generated similarly.
The DIRECTION switching circuit gives a level signal DIRECTION as a slave DIRECTION signal and CEA as an enabling signal of the master control board. When the enable signal CEA is high, EA is high. When the DIRECTION signal DIRECTION is at a high level, the divided voltage of the positive input end of the comparator is higher than the voltage of the reverse input end, the output is at a high level, FA is at a high level, the PNP triode V218 is cut off, and FB is at a low level; when the DIRECTION signal is at low level, the negative 15V connected to the positive input end of the comparator acts, the voltage at the positive input end is lower than that at the negative input end, the comparator outputs low level, FA outputs low level, the triode V218 is conducted, and FB outputs high level. When the DIRECTION is switched, when the DIRECTION signal has low level and is converted into high level, firstly, the capacitor C284 is charged through the resistor R219, the triode V293 is in a conducting state in the charging process, the gate of the triode V294 is low level, so the triode V294 of PNP is also in a conducting state, EA keeps high level for a period of time, and the time is 30 ms; when the directtiton signal changes from high level to low level, the capacitor C285 is charged through R287A and R287B, the transistor V294 is in conduction state during the charging process, and the enable signal EA keeps high level for 30 ms. Because the low level is active, the high level for a period of time ensures a safe direction switch.
The direction signals FA, FB and the enable signal EA are synthesized, as shown in fig. 9, when EA is high, the signals EF, EFA and EFB are all high, when EA is low and EA is high, EFA is high, EA and EFB are high, when EA is low and FB is high, EF and EFA are low, and EFB is high.
Fig. 10 shows the oscillating circuit of the main loop L1, where the signals + L1, -L1 and the direction signal EB are input signals, and the oscillating circuit of the upper half is activated when + L1 is high and EFB is low. When + L1 is low or EFB is high, the oscillation circuit is blocked and there is no output on the secondary side of the transformer. Similarly, the oscillating circuit in the lower half is enabled when-L1 is high and EFB is high, and is otherwise locked out.
Fig. 11 shows an oscillating circuit of the main loop L2, the principle of the oscillating circuit is completely the same as that of fig. 10, the + L2 is high level, EF is low level, and starts the oscillating circuit in the upper half, the-L2 is high level, and EF is low level and starts the oscillating circuit in the lower half, and the oscillating circuit is controlled only by the enable signal EA.
Fig. 12 shows an oscillation circuit of + L3 and-L3, similar to fig. 10.
Fig. 13 and 14 show the circuits of fig. 10 and 12 in an alternate sequence, with the motor operating in the reverse direction. Operating the oscillating circuits shown in fig. 11, 12 and 13 when the direction FB is active, the motor is operated in the reverse direction; when the direction signal FA is active, the motor operates the oscillation circuit of fig. 9, 10, 11, and the motor operates in the forward direction.
As can be seen from fig. 8, 9 and 10, in the forward and reverse switching process, EA maintains a high level for a certain time, EF is in a high level state, and all oscillation circuits are blocked, which is a dead time in order to prevent a short circuit phenomenon of the thyristor caused by an excessively fast direction switching. EFA and EFB can only have one active low at a time.
In the pulse trigger circuit, as shown in fig. 14, the pulse trigger signal is isolated by the pulse transformer, and the output pulse at the secondary side triggers the conduction of the thyristor. The oscillation pulse is connected to the gate pole of the controlled silicon after being rectified by a diode and filtered by a resistance-capacitance filter, and the controlled silicon is triggered to be conducted when a trigger signal is available. The connection mode can be that a soldering lug is used as shown in the figure, L1 is connected with the cathode of a positive thyristor, and GL1 is connected with the gate of the same thyristor; t1 is connected to the cathode of the triac and GT1 is connected to the gate thereof. The connecting circuit of the thyristor is shown in fig. 19, and T1, T2 and T3 are three-phase power supplies connected with the motor. When in the direction a, the trigger circuit is fig. 14, 16 and 17; in the direction B, the trigger circuit is shown in fig. 15, 16 and 18. When the silicon controlled rectifier is connected, 20 plug-in patches are provided, such as L1, GL1, T1, GT1, L4, GL4, T4, GT4, L2, GL2, T2, GT2, L3, GL3, T3, GT3, L5, GL5, T5 and GT 5. Meanwhile, the circuit board is additionally provided with pluggable terminals, such as five plug-in terminals LT1, LT4, LT2, LT3 and LT5 in the figure, which are connected with the controlled silicon, the connection mode is the same as that of a soldering lug, and the pluggable terminals are adopted, so that the installation and the replacement are more convenient.
In example 2, in addition to example 1, the interface circuit of the main control board is connected by a flat cable using 20-pin terminals as shown in fig. 20. And sending the power supply and the fault signal to the main control board, and receiving a direction signal, an enabling signal and a speed signal of the main control board. FIG. 21 shows a schematic diagram of a circuit for receiving an external 24V power signal, filtering with a capacitor, and displaying power information with a light emitting diode.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A pulse trigger board of voltage-regulating and speed-regulating system is composed of voltage converter, direction signal converter, synchronous voltage signal and speed setting signal combiner, direction enable signal and synchronous voltage signal oscillator, pulse trigger circuit of synchronous transformer and external connecting terminal, and features that said voltage converter receives power supply voltage and converts it to be output to main control board interface and synchronous voltage signal and speed setting signal combiner, said main control board interface is also connected to direction signal converter and communicates with main control board, said main control board interface also outputs direction enable signal to direction enable signal and synchronous voltage signal oscillator, said main control board interface also outputs speed setting signal to synchronous voltage signal and speed setting signal combiner, and the input of synchronous voltage signal and speed setting signal combiner is also connected to synchronous voltage signal converter, the output end of the synchronous voltage signal and speed given signal combination circuit is connected with a direction enabling signal and synchronous voltage signal oscillating circuit, and the direction enabling signal and synchronous voltage signal oscillating circuit is also connected with a pulse trigger circuit of a synchronous transformer.
2. The pulse trigger board of claim 1, further comprising a fault determining circuit, wherein the fault determining circuit is connected to the temperature control circuit and outputs a fault signal to the interface of the main control board, the detection of the fault determining circuit comprises detection of the main loop power supply and temperature control detection, and the detection of the main loop power supply comprises open-phase detection and phase sequence detection.
3. The pulse trigger board of claim 2, wherein the direction enable signal and synchronous voltage signal oscillating circuit comprises an oscillating circuit LT1, an oscillating circuit LT2, an oscillating circuit LT3, an oscillating circuit LT4 and an oscillating circuit LT 5.
4. The pulse trigger board of the voltage and speed regulating system according to claim 3, wherein the pulse trigger circuit of the synchronous transformer comprises a pulse transformer, a trigger circuit LT1, a trigger circuit LT2, a trigger circuit LT3, a trigger circuit LT4 and a trigger circuit LT 5.
5. The pulse trigger board of claim 4, wherein the input voltage of the voltage conversion circuit is 24VDC, and the output voltage is 15 VDC.
6. The pulse trigger board of claim 5, wherein the synchronous voltage signal transformation circuit collects three-phase synchronous voltages, and generates six synchronous pulses after passing through the composition comparison circuit of the operational amplifier, the synchronous pulses are transformed into trapezoidal wave negative voltage signals after passing through the waveform transformation, and the trapezoidal wave negative voltage signals are compared with the positive voltage signals with a given speed output by the main control board to generate six trigger pulses.
7. The pulse trigger board of claim 3, wherein the trigger circuit LT1, the trigger circuit LT2, the trigger circuit LT3, the trigger circuit LT4 and the trigger circuit LT5 have the same structure and are all silicon controlled trigger circuits, the pulse trigger signal is isolated by a pulse transformer, and the output pulse at the secondary side triggers the conduction of silicon controlled.
8. The pulse trigger board of the voltage and speed regulating system according to claims 1-7, wherein the interface circuit of the main control board adopts 20-pin terminals, is connected by a flat cable, sends power and fault signals to the main control board, and receives direction signals, enable signals and speed signals of the main control board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856565.2A CN110611466A (en) | 2019-09-11 | 2019-09-11 | Pulse trigger board of voltage and speed regulating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910856565.2A CN110611466A (en) | 2019-09-11 | 2019-09-11 | Pulse trigger board of voltage and speed regulating system |
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| CN110611466A true CN110611466A (en) | 2019-12-24 |
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| CN201910856565.2A Pending CN110611466A (en) | 2019-09-11 | 2019-09-11 | Pulse trigger board of voltage and speed regulating system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080262U (en) * | 1990-11-06 | 1991-07-03 | 姜宗俊 | Ac modulation speed adjusting, starting device |
| CN1231541A (en) * | 1998-04-03 | 1999-10-13 | 富士电机株式会社 | Speed controller for induction motor |
| CN200980059Y (en) * | 2006-11-23 | 2007-11-21 | 杨文宏 | A direct current motor speed controller of a pulse speed regulation type |
| CN101098118A (en) * | 2007-06-13 | 2008-01-02 | 邱光 | Rotation velocity control method and circuit of DC dragging system |
| CN203933474U (en) * | 2014-06-16 | 2014-11-05 | 无锡科技职业学院 | A kind of DC motor control circuit structure |
| CN207835371U (en) * | 2018-01-30 | 2018-09-07 | 西南大学 | Direct current generator with speed-regulating control circuit |
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2019
- 2019-09-11 CN CN201910856565.2A patent/CN110611466A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080262U (en) * | 1990-11-06 | 1991-07-03 | 姜宗俊 | Ac modulation speed adjusting, starting device |
| CN1231541A (en) * | 1998-04-03 | 1999-10-13 | 富士电机株式会社 | Speed controller for induction motor |
| CN200980059Y (en) * | 2006-11-23 | 2007-11-21 | 杨文宏 | A direct current motor speed controller of a pulse speed regulation type |
| CN101098118A (en) * | 2007-06-13 | 2008-01-02 | 邱光 | Rotation velocity control method and circuit of DC dragging system |
| CN203933474U (en) * | 2014-06-16 | 2014-11-05 | 无锡科技职业学院 | A kind of DC motor control circuit structure |
| CN207835371U (en) * | 2018-01-30 | 2018-09-07 | 西南大学 | Direct current generator with speed-regulating control circuit |
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Application publication date: 20191224 |