CN111146976A - Band-type brake circuit and motor driver, driving device and automation equipment thereof - Google Patents
Band-type brake circuit and motor driver, driving device and automation equipment thereof Download PDFInfo
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- CN111146976A CN111146976A CN201811309471.5A CN201811309471A CN111146976A CN 111146976 A CN111146976 A CN 111146976A CN 201811309471 A CN201811309471 A CN 201811309471A CN 111146976 A CN111146976 A CN 111146976A
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- 230000003287 optical effect Effects 0.000 claims abstract description 59
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/02—Details of stopping control
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
The embodiment of the invention discloses a band-type brake circuit, which comprises: a first common interface; the motor comprises a band-type brake interface and a power interface, wherein the power interface is used for being externally connected with the anode of a power supply, and the band-type brake interface and the power interface are respectively used for being electrically connected with two ends of a band-type brake in the motor; the first end of the input side of the third optical coupler is connected with the direct-current voltage, and the second end of the input side of the third optical coupler is electrically connected with the microprocessor; a base electrode of the second triode is electrically connected with a first end of the output side of the third optical coupler, a collector electrode of the second triode is electrically connected with a second end of the output side of the third optical coupler and is commonly electrically connected with the brake interface, and an emitter electrode of the second triode is connected with the first common interface; and the fifth resistor is electrically connected between the base electrode and the emitter electrode of the second triode. The embodiment of the invention also discloses a motor driver, a driving device and automation equipment. The invention has the advantage of realizing the band-type brake function of the motor driver with low cost.
Description
Technical Field
The invention relates to the field of drivers, in particular to a band-type brake circuit, a motor driver, a driving device and automation equipment thereof.
Background
In the prior art, a band-type brake circuit is arranged in part of motor drivers and is used for braking a motor when power is suddenly cut off so as to rapidly stop the motor.
Referring to fig. 1, the band-type brake circuit 230 in the prior art includes a third optical coupler OC3 ', a band-type brake interface BR', a second transistor VT2 ', and a fifth resistor R5'. A first end of an input side of the third optical coupler OC3 ' is connected with a direct-current voltage, and a second end of the input side of the third optical coupler OC3 ' is used for being electrically connected with the microprocessor 121 ' so as to receive a band-type brake signal output by the microprocessor; the brake interface BR ' is used for being electrically connected with a relay K ', and the relay K ' is used for being electrically connected with a brake connector in the motor; the base electrode of the second triode VT2 'is electrically connected with the first end of the output side of the third optical coupler OC 3', the collector electrode of the second triode VT2 'is electrically connected with the second end of the output side of the third optical coupler OC 3', the collector electrode of the second triode VT is commonly and electrically connected with the band-type brake interface BR ', and the emitter electrode of the second triode VT is connected with the first common interface Com 1'; the fifth resistor R5 'is electrically connected between the base and the emitter of the second transistor VT 2'. When the motor is suddenly powered off, the microprocessor cannot send a brake signal to the third optical coupler OC3 ', the third optical coupler OC3 ' is closed, the relay K ' is closed, the brake is in a normally closed state, and the motor shaft is in a locked state.
However, the prior art band-type brake circuit needs to be matched with the relay K ', and the cost of the relay K' is generally higher, so that the overall cost is higher. More importantly, the action of the relay K' is usually delayed greatly, so that the locking delay of the motor can be caused, and safety accidents are caused.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide a band-type brake circuit, a motor driver, a driving device and automation equipment thereof. The motor driver can realize the band-type brake function with low cost.
In order to solve the above technical problem, an embodiment of a first aspect of the present invention provides a band-type brake circuit applied in a motor driver, including:
the first end of the input side of the third optical coupler is connected with the direct-current voltage, and the second end of the input side of the third optical coupler is used for being connected with a brake signal output by the microprocessor;
the brake interface and the power interface are respectively used for being electrically connected with a brake connector in the motor;
a base electrode of the second triode is electrically connected with a first end of the output side of the third optical coupler, a collector electrode of the second triode is electrically connected with a second end of the output side of the third optical coupler and is commonly electrically connected with the brake interface, and an emitter electrode of the second triode is connected with the first common interface;
and the fifth resistor is electrically connected between the base electrode and the emitter electrode of the second triode.
In an embodiment of the first aspect of the present invention, the internal contracting brake circuit further includes a fourth diode, an anode of the fourth diode is electrically connected to the internal contracting brake interface, and a cathode of the fourth diode is electrically connected to the power supply interface.
In a second aspect, an embodiment of the invention provides a motor driver, which includes the above band-type brake circuit.
In an embodiment of the second aspect of the present invention, the motor driver further comprises a command switch switching circuit, the command switch switching circuit comprising at least one signal switching circuit; the signal switching circuit includes:
the first interface can be used for accessing command signals with different voltage values;
one end of the resistance-changing unit is electrically connected with the first interface;
a first optical coupler, wherein the first end of the input side of the first optical coupler is electrically connected with the other end of the variable resistance unit;
a second interface electrically connected to the second end of the input side of the first optocoupler;
the variable resistance unit is switched and matched into different resistance values according to different voltage values of the first interface access instruction signal.
In an embodiment of the second aspect of the present invention, the resistance varying unit includes at least one switch and at least two resistors respectively connected to the switch; when the change-over switch is switched to different positions, the change-over switch is electrically connected with the resistors at the corresponding positions, and the variable resistance units output different resistance values.
In an embodiment of the second aspect of the present invention, the switch is a single-pole double-throw switch.
In an embodiment of the second aspect of the present invention, the instruction signal is one or more of a pulse signal, a direction signal, an enable signal, and a reset signal.
In an embodiment of the second aspect of the present invention, the motor driver further comprises at least one command-compatible circuit, the command-compatible circuit comprising:
a third interface, which can be used for accessing command signals with different voltage values;
a collector of the first triode is electrically connected with the third interface;
one end of the third resistor is electrically connected with the third interface;
the anode of the second diode is electrically connected with the other end of the third resistor, and the cathode of the second diode is electrically connected with the base electrode of the first triode;
one end of the fourth resistor is electrically connected with the emitter of the first triode;
a second optical coupler, a first end of an input side of which is electrically connected with the other end of the fourth resistor;
a fourth interface electrically connected to a second end of the input side of the second optocoupler;
and two ends of the voltage stabilizing unit are respectively and electrically connected with the anode of the second diode and the second end of the input side of the second optical coupler, and the voltage stabilizing unit is used for stabilizing the voltage values of the two ends of the voltage stabilizing unit.
In an embodiment of the second aspect of the present invention, the instruction compatible circuit further includes a second capacitor, and two ends of the second capacitor are electrically connected to the first end and the second end of the input side of the second optical coupler, respectively.
In an embodiment of the second aspect of the present invention, the instruction compatible circuit further includes an anti-reverse diode, the anti-reverse diode is connected in series to an electrical loop formed by the third interface, the collector of the first triode, the emitter of the first triode, the fourth resistor, the second optical coupler, and the fourth interface, the anode of the anti-reverse diode is electrically connected to the third interface, and the cathode of the anti-reverse diode is electrically connected to the fourth interface.
In an embodiment of the second aspect of the present invention, the instruction signal accessed by the instruction compatible circuit is one or more of a pulse signal, a direction signal, an enable signal, and a reset signal.
In one embodiment of the third aspect of the present invention, a driving device is provided, which includes a motor, and the driving device includes the motor driver.
According to a fourth aspect of the present invention, an embodiment provides an automation device, including the above-mentioned driving apparatus.
The embodiment of the invention has the following beneficial effects:
the contracting brake circuit comprises a contracting brake interface, a power supply interface, a third optical coupler and a second triode, wherein the contracting brake interface and the power supply interface are respectively used for being electrically connected with two ends of a contracting brake in the motor, a first end of the input side of the third optical coupler is connected with direct-current voltage, and a second end of the input side of the third optical coupler is used for being electrically connected with the microprocessor; the base electrode of the second triode is electrically connected with the first end of the output side of the third optical coupler, the collector electrode of the second triode is electrically connected with the second end of the output side of the third optical coupler and is electrically connected with the contracting brake interface together, and the emitter electrode of the second triode is connected with the first common interface. Therefore, when the motor is powered on, the microprocessor sends a contracting brake signal to the third optocoupler unit, the third optocoupler works, the second triode works, and the contracting brake signal is sent to the contracting brake through the contracting brake interface, so that current passes through an internal coil of the contracting brake, a magnetic field generated by the current of the coil enables a motor shaft to be in a free state, and the motor can rotate freely. When the motor driver is suddenly powered off, the microprocessor cannot send a contracting brake signal to the third optical coupler, the third optical coupler is closed, so that the second triode does not work, the contracting brake interface cannot send the contracting brake signal to the contracting brake, no current passes through an internal coil of the contracting brake, the contracting brake is in a normally closed state, the motor shaft is in a locked state, and the motor stops working rapidly. Compared with the prior art, the contracting brake circuit of the embodiment of the invention omits a relay, so that the cost is lower, the time delay is less, the contracting brake is rapid, and the safety accident is not easy to cause; in addition, the outer side of the band-type brake circuit does not need to be connected with a relay, and is directly connected with the band-type brake, so that the wiring is less, the maintenance work difficulty is reduced, and the band-type brake is very suitable for popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art band-type brake circuit of a motor drive;
FIG. 2 is a schematic diagram of a band-type brake circuit according to an embodiment of the present invention;
FIG. 3 is a block diagram of a motor driver according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of a signal switching circuit according to an embodiment of the present invention;
FIG. 5 is a circuit diagram of an instruction compatible circuit according to an embodiment of the present invention;
reference numbers of the drawings:
OC 3' -third optical coupler; BR' -band-type brake interface; com 1' -a first common interface; VT 2' -second triode; r5' -fifth resistor; a K' -relay; 121' -a microprocessor; du1 — first interface; du2 — second interface; du3 — third interface; du 4-fourth interface; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; d1 — first diode; d2 — second diode; d3-anti-reverse diode; d4 — fourth diode; c1 — first capacitance; c2 — second capacitance; OC1 — first optical coupler; OC 2-second optical coupler; OC 3-third optical coupler; ZD-stabilivolt; s-a diverter switch; VT 1-first triode; VT 2-second transistor; com1 — first public interface; BR-band-type brake interface; a DC-power interface; 110-an alarm unit; 121-a microprocessor; 130-a band-type brake unit; 210-a command switch switching circuit; 211-signal switching circuitry; 211 a-a varistor unit; 220-instruction compatible circuits.
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.
The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
The embodiment of the invention provides a band-type brake circuit, which is applied to a motor driver, wherein the motor driver can be a stepping motor driver or a servo motor driver. Referring to fig. 2, the band-type brake circuit includes a first common interface Com1, a band-type brake interface BR, a power interface DC, a third optical coupler OC3, a second transistor, and a fifth resistor R5.
In this embodiment, the first common interface Com1 is a common terminal, and may be connected to ground or a negative electrode of a power supply.
In this embodiment, band-type brake interface BR is arranged in the band-type brake ware output band-type brake signal to the outside, power source interface DC is used for external power source's positive pole, band-type brake interface BR and power source interface DC are used for respectively being connected with the both ends electricity of the band-type brake ware in the motor.
In this embodiment, a first end of the input side of the third optocoupler OC3 is connected to a dc voltage through a sixth resistor R6, the dc voltage is supplied by the motor driver, a second end of the input side of the third optocoupler OC3 is used to electrically connect to the microprocessor 121 (please refer to fig. 3 in combination), the microprocessor 121 sends a brake signal to the second end of the input side of the third optocoupler OC3, when the microprocessor 121 sends the brake signal, the third optocoupler OC3 is operated, and when the microprocessor 121 does not send the brake signal (for example, power off), the third optocoupler OC3 is not operated.
In this embodiment, the base of the second transistor VT2 is electrically connected to the first end of the output side of the third optical coupler OC3, the collector of the second transistor VT2 is electrically connected to the second end of the output side of the third optical coupler OC3, and is commonly electrically connected to the band-type brake interface BR, and the emitter of the second transistor VT2 is connected to the first common interface Com 1. In this embodiment, the second transistor VT2 is configured to amplify the band-type brake signal transmitted by the third optical coupler OC3, and output the amplified band-type brake signal to the band-type brake through the band-type brake interface BR, so that a current may pass through an internal coil of the band-type brake, and a magnetic field generated by the coil current enables a motor shaft of the motor to be in a free state.
In this embodiment, the fifth resistor R5 is electrically connected between the base and the emitter of the second transistor VT 2.
In this embodiment, when the motor is powered on, the microprocessor 121 sends a brake signal to the third optocoupler unit, and the third optocoupler OC3 works, so that the third optocoupler OC3 drives the second transistor VT2 to work, and sends the brake signal to the brake through the brake interface BR, so that a current passes through an internal coil of the brake, a magnetic field generated by the coil current enables the motor shaft to be in a free state, and the motor can rotate freely. When the power supply is cut off, microprocessor 121 can not send the band-type brake signal for third optical coupler OC3, third optical coupler OC3 closes to second triode VT2 is out of work, and band-type brake interface BR can not send the band-type brake signal for the band-type brake, and the internal coil of band-type brake does not have the electric current to pass through, and the band-type brake is in normally closed state, and the motor shaft is in the lock state, and the motor stops working rapidly. Compared with the prior art, the contracting brake circuit of the embodiment of the invention omits a relay, so that the contracting brake circuit has the advantages of low cost, simplified structure, less time delay, rapid contracting brake and difficult safety accident initiation; in addition, the outer side of the band-type brake circuit does not need to be connected with a relay, the band-type brake is directly connected with a band-type brake device, wiring is less, the maintenance work difficulty is reduced, and the band-type brake circuit is very suitable for popularization.
In this embodiment, the band-type brake circuit further includes a fourth diode D4, an anode of the fourth diode D4 is electrically connected to the band-type brake interface BR, and a cathode of the fourth diode D4 is electrically connected to the power interface DC. Through the setting of the fourth diode D4, when the third optical coupler OC3 does not receive a brake signal, the voltage on the brake interface BR can be released through the fourth diode D4, so that the brake and the second triode VT2 can be prevented from being damaged due to the instantaneous large voltage of the brake interface BR when the third optical coupler OC3 does not receive a signal.
The embodiment of the invention also provides a motor driver, which can be a stepping motor driver or a servo motor driver. Referring to fig. 3, the motor driver includes a command switch switching circuit 210, and the command switch switching circuit 210 includes at least one signal switching circuit 211.
Referring to fig. 4, in the present embodiment, the signal switching circuit 211 includes a first interface Du1, a second interface Du2, a resistance-changing unit 211a, and a first optical coupler OC 1.
In this embodiment, the first interface Du1 may be used to receive command signals with different voltage values, and the command signals with different voltages may be command signals with two different voltage values, command signals with three different voltage values, command signals with four different voltage values, or command signals with more different voltage values. The instruction signal can be one or more of a pulse signal, a direction signal and an enabling signal.
In this embodiment, the first interface Du1 is used to receive two pulse signals with different voltage values, the voltage values of the two pulse signals are 5V and 24V, respectively, and the pulse signals are finally converted into the angular displacement of the motor. In this embodiment, the first interface Du1 is a motor driver for externally connecting to other control systems, the control system sends a pulse signal to the first interface Du1, and the first interface Du1 of this embodiment can be used to access pulse signals with different voltage values because the voltage values of the pulse signals output by the control systems of different manufacturers are different, so that the first signal switching circuit 211 of the present invention can be compatible with the control systems of different manufacturers. For example, the voltage value of the pulse signal output by the control system of one manufacturer is 5V, and the voltage value of the pulse signal output by the control system of another manufacturer is 24V, and at this time, the control systems provided by the two manufacturers can be compatible through the first signal switching circuit 211 of the present invention.
In this embodiment, the variable resistance unit 211a is electrically connected to the first interface Du1 and the first end of the input side of the first optical coupler OC1, respectively, the variable resistance unit 211a is manually or automatically switched and matched to different resistance values according to different voltage values of the first interface Du1 access command signal, for example, when the voltage value of the pulse signal accessed by the first interface Du1 is 5V, the variable resistance unit 211a is switched to a smaller resistance value, and when the voltage value of the pulse signal accessed by the first interface Du1 is 24V, the variable resistance unit 211a is switched to a larger resistance value in order to prevent the first optical coupler OC1 electrically connected to the first signal switching circuit 211 from being damaged. In this embodiment, the resistance varying unit 211a is manually adjusted to different resistance values by a mechanical switch.
In this embodiment, the second interface Du2 is electrically connected to the second end of the input side of the first optical coupler OC 1.
In this embodiment, the resistance varying unit 211a may form two resistance values, and the two resistance values respectively correspond to two different voltage values of the pulse signal accessed by the first interface Du 1. In addition, in another embodiment of the present invention, the resistance varying unit 211a may form a plurality of resistance values, and the plurality of resistance values respectively correspond to a plurality of different voltage values of the pulse signal accessed by the first interface Du 1.
Referring to fig. 2, in the present embodiment, the resistance-changing unit 211a includes a switch S, and a first resistor R1 and a second resistor R2 respectively connected to the switch S, where resistance values of the first resistor R1 and the second resistor R2 are different, a resistance value of the first resistor R1 is smaller than a resistance value of the second resistor R2 in the present embodiment, a voltage value of the first resistor R1 corresponding to the pulse signal accessed by the first interface Du1 is 5V, and a voltage value of the second resistor R2 corresponding to the pulse signal accessed by the first interface Du1 is 24V. In addition, in other embodiments of the present invention, the variable resistance unit 211a may further include a plurality of switches S and a plurality of resistors respectively connected to the switches S. In this embodiment, when the switch S is switched to a different position, the switch S is electrically connected to the resistor at the corresponding position, and the resistance varying unit 211a outputs a different resistance value, for example, when the voltage value of the pulse signal to be accessed by the first interface Du1 is 5V, the user may toggle the switch S to electrically connect the switch S to the first resistor R1, the resistance value of the resistance varying unit 211a is the resistance value of the first resistor R1, when the voltage value of the pulse signal to be accessed by the first interface Du1 is 24V, the user may toggle the switch S to electrically connect the switch S to the second resistor R2, and the resistance value of the resistance varying unit 211a is the resistance value of the second resistor R2. In this embodiment, the switch S is a single-pole double-throw switch. Of course, in other embodiments of the present invention, when the resistance-changing unit 211a has more resistances with different resistance values, the switch S is a single-pole multi-throw switch.
Referring to fig. 2, in the present embodiment, the signal switching circuit 211 further includes a first capacitor C1, two ends of the first capacitor C1 are electrically connected to the first end and the second end of the input side of the first optocoupler OC1, respectively, that is, the first capacitor C1 is connected in parallel to the first optocoupler OC 1. Due to the addition of the first capacitor C1, the variable resistance unit 211a and the first capacitor C1 can form an RC filter circuit, and the anti-interference performance of the first signal switching circuit 211 can be improved.
In this embodiment, the signal switching circuit 211 further includes a first diode D1, and two ends of the first diode D1 are electrically connected to the first end and the second end of the input side of the first optocoupler OC1, respectively. Wherein, the anode of the first diode D1 is electrically connected with the second end of the input side of the first optical coupler OC1, and the cathode of the first diode D1 is electrically connected with the first end of the input side of the first optical coupler OC 1. Therefore, when the pulse signal is inverted, for example, a pulse signal with a voltage value of 5V or 24V is connected to the second interface Du2, the first diode D1 is directly turned on, and since the first optocoupler OC1 is connected in parallel with the first diode D1, the voltage applied to the first optocoupler OC1 is small, so that the first optocoupler OC1 is not damaged, thereby being beneficial to protecting the first optocoupler OC1 through the connected first diode D1 when the pulse signal is inverted.
With continued reference to fig. 3, the motor driver includes at least one command compatible circuit 220, and the motor driver may include one command compatible circuit 220, two command compatible circuits 220, three command compatible circuits 220, or more command compatible circuits 220, and in the present embodiment, the motor driver includes one command compatible circuit 220.
Referring to fig. 5, the command compatible circuit 220 includes a third interface Du3, a first transistor VT1, a third resistor R3, a second diode D2, a fourth resistor R4, a second optocoupler OC2, a fourth interface Du4, and a regulator ZD.
In this embodiment, the third interface Du3 may be used to receive command signals with different voltage values, and the command signals with different voltage values may be command signals with two different voltage values, command signals with three different voltage values, command signals with four different voltage values, or command signals with more different voltage values. The command signal is one or more of a pulse signal, a direction signal, and an enable signal, for example, when the first interface Du1 of the signal switching circuit 211 is connected with pulse signals with different voltage values, the third interface Du3 is connected with direction signals with different voltage values or enable signals with different voltage values; or, when the first interface Du1 of the signal switching circuit 211 receives direction signals with different voltage values, the third interface Du3 receives pulse signals with different voltage values or enable signals with different voltage values; or, when the first interface Du1 of the signal switching circuit 211 receives enable signals with different voltage values, the third interface Du3 receives pulse signals with different voltage values or direction signals with different voltage values.
In this embodiment, the third interface Du3 is used to receive two enable signals with different voltage values, the voltage values of the two enable signals are 5V and 24V, respectively, and the enable signals with the two voltage values are the enable signals commonly used by the user. In this embodiment, the third interface Du3 is a motor driver for externally connecting to other control systems, the control system sends an enable signal to the third interface Du3, and since the voltage values of the enable signals output by the control systems of different manufacturers are different, the third interface Du3 of this embodiment may be used to access the enable signals with different voltage values, so that the command compatible circuit 220 of this embodiment may be compatible with the control systems of different manufacturers. For example, the voltage value of the enable signal output by the control system of one manufacturer is 5V, and the voltage value of the enable signal output by the control system of another manufacturer is 24V, so that the control systems provided by the two manufacturers can be compatible through the command compatible circuit 220 of the present invention, thereby expanding the application range of the motor driver of the present invention.
In this embodiment, a collector of the first triode VT1 is electrically connected to the third interface Du3, a first end of the third resistor R3 is electrically connected to the third interface Du3, a second end of the third resistor R3 is electrically connected to an anode of the second diode D2 and a cathode of the zener diode ZD respectively, a cathode of the second diode D2 is electrically connected to a base of the first triode VT1, an emitter of the first triode VT1 is electrically connected to a first end of the fourth resistor R4, a second end of the fourth resistor R4 is electrically connected to a first end of an input side of the optocoupler, a second end of the input side of the optocoupler is electrically connected to a cathode of the zener diode ZD, and the second end of the input side of the optocoupler and the anode of the zener diode ZD are electrically connected to the fourth interface Du4 together.
In this embodiment, the voltage regulator ZD is used to stabilize the voltage at two ends of the voltage regulator ZD, for example, to maintain the voltage at two ends of the voltage regulator ZD at about 5V, for example, when the voltage value of the enable signal input by the third interface Du3 is 5V, the voltage at two sides of the voltage regulator ZD is maintained at slightly lower than 5V, and when the voltage value of the enable signal input by the third interface Du3 is 24V, the voltage at two sides of the voltage regulator ZD is maintained at about 5V. Therefore, the voltages at two sides of the voltage regulator tube ZD are maintained to be stable, the voltage between the base of the first triode VT1 and the second end of the input side of the second optical coupler OC2 is stable, the voltage between the emitter of the first triode VT1 and the second end of the input side of the second optical coupler OC2 is stable, and by adjusting the size of the fourth resistor R4, the current flowing between the first end and the second end of the input side of the second optical coupler OC2 can be determined to be stable, and even if the third interface Du3 is connected with signals with voltages of different sizes, the current flowing through the input side of the second optical coupler OC2 is stable as a whole. Therefore, through the arrangement of the voltage regulator tube ZD, the first end and the second end of the input side of the second optical coupler OC2 are located at the two ends of the voltage regulator tube ZD, so that the command compatible circuit 220 is a constant voltage circuit, the voltage value of the command signal input by the third interface Du3 is reduced through the voltage regulator tube ZD, the fluctuation of the voltage value of the command signal at the third interface Du3 can be reduced, the voltages at the two sides of the voltage regulator tube ZD can be relatively stable, and the anti-interference capability of the command compatible circuit 220 can be favorably improved; the command compatible circuit 220 of the present invention can be connected to command signals of different voltage values. In addition, in the present embodiment, since the base of the first triode VT1 is electrically connected to the second diode D2, the threshold voltage of the first triode VT1 can be raised, so that when the voltage at the two ends of the voltage regulator ZD is disturbed to cause small fluctuations, the second diode D2 can also cancel the fluctuations, and the interference rejection capability of the command compatible circuit 220 of the present embodiment is further enhanced. In this embodiment, the third resistor R3 is used for voltage division, so that the voltage across the zener diode ZD is relatively stable.
In this embodiment, the command compatible circuit 220 further includes a second capacitor C2, two ends of the second capacitor C2 are electrically connected to the first end and the second end of the input side of the second optocoupler OC2, that is, the second capacitor C2 is connected in parallel to the input side of the second optocoupler OC2, and by providing the second capacitor C2, the second capacitor C2 and the fourth resistor R4 form an RC circuit, so that the interference rejection capability of the command compatible circuit 220 is further improved.
In this embodiment, the command compatible circuit 220 further includes an anti-reverse diode D3, the anti-reverse diode D3 is connected in series to an electrical loop formed by the third interface Du3, the collector of the first transistor VT1, the emitter of the first transistor VT1, the fourth resistor R4, the second optocoupler OC2, and the fourth interface Du4, the anode of the anti-reverse diode D3 is electrically connected to the third interface Du3 directly or indirectly, and the cathode of the anti-reverse diode D3 is electrically connected to the fourth interface Du4 directly or indirectly. In this embodiment, the anode of the reverse diode D3 is directly electrically connected to the third interface Du3, that is, the first end of the third resistor R3 and the anode of the reverse diode D3 are electrically connected to the third interface Du3 together, the cathode of the reverse diode D3 is electrically connected to the collector of the first transistor VT1, and when a voltage signal is received at the fourth interface Du4, the reverse diode D3 may prevent the second optocoupler OC2 from operating, so as to prevent the second optocoupler OC2 from being damaged. In addition, in other embodiments of the present invention, the anti-reverse diode D3 may also be connected in series between the emitter stage of the first transistor VT1 and the fourth resistor R4, between the fourth resistor R4 and the second optocoupler OC2, or between the second optocoupler OC2 and the fourth interface Du 4.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (13)
1. A band-type brake circuit is applied to a motor driver, and is characterized by comprising:
a first common interface;
the motor comprises a band-type brake interface and a power interface, wherein the power interface is used for being externally connected with the anode of a power supply, and the band-type brake interface and the power interface are respectively used for being electrically connected with two ends of a band-type brake in the motor;
the first end of the input side of the third optical coupler is connected with the direct-current voltage, and the second end of the input side of the third optical coupler is electrically connected with the microprocessor;
a base electrode of the second triode is electrically connected with a first end of the output side of the third optical coupler, a collector electrode of the second triode is electrically connected with a second end of the output side of the third optical coupler and is commonly electrically connected with the brake interface, and an emitter electrode of the second triode is connected with the first common interface;
and the fifth resistor is electrically connected between the base electrode and the emitter electrode of the second triode.
2. The brake circuit according to claim 1, wherein the brake circuit further comprises a fourth diode, an anode of the fourth diode is electrically connected to the brake interface, and a cathode of the fourth diode is electrically connected to the power interface.
3. A motor drive comprising a band-type brake circuit according to claim 1 or 2.
4. The motor driver of claim 3, further comprising a command switch switching circuit comprising at least one signal switching circuit; the signal switching circuit includes:
the first interface can be used for accessing command signals with different voltage values;
one end of the resistance-changing unit is electrically connected with the first interface;
a first optical coupler, wherein the first end of the input side of the first optical coupler is electrically connected with the other end of the variable resistance unit;
a second interface electrically connected to the second end of the input side of the first optocoupler;
the variable resistance unit is switched and matched into different resistance values according to different voltage values of the first interface access instruction signal.
5. The motor driver of claim 4, wherein the variable resistance unit includes at least one switching switch and at least two resistors respectively connected to the switching switch; when the change-over switch is switched to different positions, the change-over switch is electrically connected with the resistors at the corresponding positions, and the variable resistance units output different resistance values.
6. The motor drive of claim 5 wherein said diverter switch is a single pole double throw diverter switch.
7. The motor driver of claim 4, wherein the command signal is one or more of a pulse signal, a direction signal, an enable signal, and a reset signal.
8. The motor driver of claim 3, further comprising at least one command compatible circuit, wherein the command compatible circuit comprises:
a third interface, which can be used for accessing command signals with different voltage values;
a collector of the first triode is electrically connected with the third interface;
one end of the third resistor is electrically connected with the third interface;
the anode of the second diode is electrically connected with the other end of the third resistor, and the cathode of the second diode is electrically connected with the base electrode of the first triode;
one end of the fourth resistor is electrically connected with the emitter of the first triode;
a second optical coupler, a first end of an input side of which is electrically connected with the other end of the fourth resistor;
a fourth interface electrically connected to a second end of the input side of the second optocoupler;
and two ends of the voltage stabilizing unit are respectively and electrically connected with the anode of the second diode and the second end of the input side of the second optical coupler, and the voltage stabilizing unit is used for stabilizing the voltage values of the two ends of the voltage stabilizing unit.
9. The motor driver of claim 8, wherein the command-compatible circuit further comprises a second capacitor, and both ends of the second capacitor are electrically connected to the first end and the second end of the input side of the second optocoupler, respectively.
10. The motor driver of claim 8, wherein the command-compatible circuit further comprises an anti-reverse diode, the anti-reverse diode being connected in series to an electrical loop formed by the third interface, the collector of the first transistor, the emitter of the first transistor, the fourth resistor, the second optocoupler, and the fourth interface, wherein the anode of the anti-reverse diode is electrically connected to the third interface, and the cathode of the anti-reverse diode is electrically connected to the fourth interface.
11. The motor driver of claim 8, wherein the command signal accessed by the command compatible circuit is one or more of a pulse signal, a direction signal, an enable signal and a reset signal.
12. A drive arrangement comprising a motor, characterized in that the drive arrangement comprises a motor drive according to any one of claims 3 to 11.
13. An automated apparatus, characterized by comprising the drive device of claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309471.5A CN111146976A (en) | 2018-11-05 | 2018-11-05 | Band-type brake circuit and motor driver, driving device and automation equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309471.5A CN111146976A (en) | 2018-11-05 | 2018-11-05 | Band-type brake circuit and motor driver, driving device and automation equipment thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111146976A true CN111146976A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811309471.5A Pending CN111146976A (en) | 2018-11-05 | 2018-11-05 | Band-type brake circuit and motor driver, driving device and automation equipment thereof |
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| CN (1) | CN111146976A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900897A (en) * | 2020-07-03 | 2020-11-06 | 广东博智林机器人有限公司 | Band-type brake circuit, servo driver and detection method of band-type brake circuit |
| CN114670198A (en) * | 2022-03-29 | 2022-06-28 | 北京京东乾石科技有限公司 | System for releasing band-type brake and conveying robot |
| WO2022217847A1 (en) * | 2021-04-13 | 2022-10-20 | 苏州汇川技术有限公司 | Driving and monitoring circuits for band brake of servo motor |
-
2018
- 2018-11-05 CN CN201811309471.5A patent/CN111146976A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111900897A (en) * | 2020-07-03 | 2020-11-06 | 广东博智林机器人有限公司 | Band-type brake circuit, servo driver and detection method of band-type brake circuit |
| CN111900897B (en) * | 2020-07-03 | 2022-02-22 | 广东博智林机器人有限公司 | Band-type brake circuit, servo driver and detection method of band-type brake circuit |
| WO2022217847A1 (en) * | 2021-04-13 | 2022-10-20 | 苏州汇川技术有限公司 | Driving and monitoring circuits for band brake of servo motor |
| CN114670198A (en) * | 2022-03-29 | 2022-06-28 | 北京京东乾石科技有限公司 | System for releasing band-type brake and conveying robot |
| CN114670198B (en) * | 2022-03-29 | 2024-04-05 | 北京京东乾石科技有限公司 | System for be used for separating band-type brake and transfer robot |
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