CN113572399A - STO circuit control system - Google Patents
STO circuit control system Download PDFInfo
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- CN113572399A CN113572399A CN202110914237.0A CN202110914237A CN113572399A CN 113572399 A CN113572399 A CN 113572399A CN 202110914237 A CN202110914237 A CN 202110914237A CN 113572399 A CN113572399 A CN 113572399A
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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
- H02P8/00—Arrangements for controlling dynamo-electric motors of the kind having motors rotating step by step
- H02P8/36—Protection against faults, e.g. against overheating, step-out; Indicating faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
- H02H7/0844—Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error
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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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
Abstract
The embodiment of the application discloses STO circuit control system is applied to elevator control to promote elevator control's security. The STO circuit control system in the embodiment of the present application includes: the control system comprises a safety circuit, an operation output relay, an STO circuit, a first control terminal and a motor; the safety circuit includes: a safety switch; the safety switch is connected with one end of a first normally open contact of the operation output relay; the other end of the first normally-open contact is connected with the voltage input end of the STO circuit in series; the signal output end of the STO circuit is connected with the control terminal; the first control terminal is connected with the motor; and if the first control terminal detects an effective signal of the SIO circuit, the driving motor operates.
Description
Technical Field
The embodiment of the application relates to the field of elevator control, in particular to an STO circuit control system.
Background
With the continuous development of society, elevators play an important role in daily life of people. It is a not negligible problem to ensure the safety and reliability of the elevator while enjoying the convenience brought by the elevator.
In the field of elevator control, in order to ensure the safety and reliability of motor control, a contactor needs to be connected between a controller and a motor in series, and a feedback contact of the contactor is sent to software for detection so as to confirm the safety and reliability of a motor driving loop. When the motor needs to be driven, the contactor is opened firstly, and the feedback signal is detected, if the logic is correct, the driving motor can be driven, otherwise, the motor cannot be driven.
However, this solution requires increasing contactors of different specifications according to different powers, and when the contactor is operated, large electromagnetic interference is easily generated around the contactor, which is likely to cause instability of the system. This makes the circuit work normally, has influenced the fail safe nature of elevator.
Disclosure of Invention
The embodiment of the application provides an STO circuit control system, which is applied to elevator control to improve the safety of elevator control.
An STO circuit control system comprising:
the control system comprises a safety circuit, an operation output relay, an STO circuit, a first control terminal and a motor;
the safety circuit includes: a safety switch;
the operation output relay comprises a first control circuit and a first normally open contact, and the first control circuit is used for receiving a control signal;
the first normally-open contact is connected between the voltage input end of the STO circuit and a reference voltage in series, and the voltage output end of the STO circuit is connected with a zero voltage end;
the safety switch is connected with the first end of the first normally-open contact;
the signal output end of the STO circuit is connected with the first control terminal;
the first control terminal is connected with the motor;
and if the first control terminal detects an effective signal of the STO circuit, driving the motor to operate.
Optionally, the STO circuit control system further includes:
a second control terminal;
the second control terminal is connected with the first control circuit of the operation output relay and used for receiving a control signal;
and if the second control terminal sends an operation instruction, the armature of the operation output relay is attracted, so that the first normally open contact is closed.
Alternatively to this, the first and second parts may,
the safety circuit is a low-voltage safety circuit;
the low voltage safety circuit includes: a low voltage safety switch;
the low-voltage safety switch is connected with the first normally-open contact in series.
Optionally, the STO circuit control system further includes: the safety relay comprises a second control circuit and a second normally open contact;
the safety circuit is a high-voltage safety circuit;
the high voltage safety circuit includes: a high voltage safety switch;
the high-voltage safety switch is connected in series with a second control circuit of the safety relay, and the second normally-open contact is connected in series with the first normally-open contact.
Optionally, the first control terminal is a personal computer or a single chip microcomputer;
the second control terminal is a personal computer or a singlechip.
Optionally, the safety relay is an electromagnetic relay or a solid-state relay.
Optionally, the motor is a servo motor or a stepping motor.
Optionally, the STO circuit includes:
the circuit comprises a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a first capacitor (C1), a second capacitor (C2), an isolation optocoupler (IC1) and an NOT gate (A2);
a first end of the first resistor (R1) is an input end of the STO circuit, a second end of the first resistor (R1) is respectively connected with a first end of the first diode (D1) and a second end of the second diode (D2), a second end of the first diode (D1) is respectively connected with a second end of the fourth diode (D4), a second end of the second resistor (R2), a second end of the first capacitor (C1) and a first end of the isolation optical coupler (IC1), and a first end of the isolation optical coupler (IC1) is an input end of the isolation optical coupler (IC 1);
a second terminal of the third diode (D3) is connected to a first terminal of the fourth diode (D4), a second terminal of the third diode (D3) serves as an output terminal of the STO circuit, and a first terminal of the third diode (D3) is respectively connected to a first terminal of the second diode (D2), a first terminal of the second resistor (R2), a first terminal of the first capacitor (C1), and a second terminal of the isolation optocoupler (IC 1);
the third end of the isolation optocoupler (IC1) is grounded, the fourth end of the isolation optocoupler (IC1) is respectively connected with the first end of the third resistor (R3), the first end of the fourth diode (D4) and the first end of the fifth resistor (R5), and the second end of the third resistor (R3) and the second end of the fourth diode (D4) are connected to serve as a five-volt voltage input end;
a second end of the fifth resistor (R5) is respectively connected with a first end of the second capacitor (C2) and a third end of the NOT gate (A2), and a second end of the second capacitor (C2) is grounded;
the second end of the NOT gate (A2) is grounded, the fourth end of the NOT gate (A2) is the signal output end of the NOT gate (A2), and the fifth end of the NOT gate (A2) is used as a three-point three-volt input end.
Optionally, the STO circuit further includes: a light emitting diode (D5);
a second terminal of the third resistor (R3) and a second terminal of the light emitting diode (D5) are connected as a five-volt input terminal, and a first terminal of the light emitting diode (D5) is connected to a second terminal of the fourth diode (D4).
Optionally, the STO circuit further includes: a sixth resistor (R6) and a third capacitor (C3);
the first end of the sixth resistor (R6) is connected with the fourth end of the NOT gate (A2), the second end of the sixth resistor (R6) is connected with the first end of the third capacitor (C3), the second end of the sixth resistor (R6) is a signal output end, and the second end of the third capacitor (C3) is grounded.
According to the technical scheme, the embodiment of the application has the following advantages:
the driving motor in the embodiment of the application is controlled by operating the output relay and the STO circuit, so that the problem of electromagnetic interference caused by controlling the driving motor through the contactor in the prior art is avoided, and the safety of the driving motor is improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an STO circuit control system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another embodiment of an STO circuit control system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of another embodiment of an STO circuit control system according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an embodiment of an STO circuit according to an embodiment of the present application;
FIG. 5 is a schematic diagram of another embodiment of an STO circuit according to an embodiment of the present application;
FIG. 6 is a schematic diagram of another embodiment of an STO circuit according to an embodiment of the present application;
fig. 7 is a schematic diagram of another embodiment of the STO circuit control system according to the embodiment of the present application.
Detailed Description
The embodiment of the application provides an STO circuit control system, which is applied to elevator control to improve the safety of elevator control.
The STO circuit control system in the embodiment of the present application is described below. Referring to fig. 1, an embodiment of an STO circuit control system according to the embodiment of the present application includes:
a safety circuit 101, an operation output relay 102, an STO circuit 103, a first control terminal 104, and a motor 105;
the safety circuit 101 comprises a safety switch 1011, and the safety switch 1011 is used for ensuring the basic safety of the circuit;
the operation output relay 102 comprises a first control circuit 1022 and a first normally open contact 1021, wherein the first control circuit 1022 is used for receiving a control signal;
the first normally-open contact 1021 is connected in series between the voltage input end of the STO circuit 103 and the reference voltage, and the voltage output end of the STO circuit 103 is connected with a zero voltage end;
the safety switch 1011 is connected with a first normally open contact 1021;
the signal output of STO circuit 103 is connected to first control terminal 104 to enable first control terminal 104 to detect the output signal of STO circuit 103;
the first control terminal 104 is connected with the motor 105;
if the first control terminal 104 detects a valid signal from the STO circuit 103, the drive motor 105 is operated.
In the embodiment of the present application, when the motor 105 needs to be driven, the safety circuit 101 is turned on. When the safety circuit 101 is turned on, since the safety circuit 101 is connected to the STO circuit 103 and the STO circuit 103 is turned on, the first control terminal 104 detects that the STO circuit 103 is active, and the drive motor 105 is operated.
The original contactor is replaced with the STO circuit to this application embodiment, can avoid among the prior art the produced electromagnetic interference problem of contactor action to promote motor control's security.
Based on the embodiment described in fig. 1, with continued reference to fig. 2, the STO circuit control system may further include a second control terminal 106. The second control terminal 106 is connected to the first control circuit 1022 of the operation output relay 102, so that when the second control terminal 106 sends an operation instruction, the armature of the operation output relay 102 is attracted, and the first normally open contact 1021 is closed.
In this embodiment, the first control terminal 104 and the second control terminal 106 may be computers or single-chip microcomputers, and are not limited herein.
In this embodiment, the motor 105 may be a servo motor, or may be a motor that can realize normal operation of the elevator, such as a stepping motor, and is not limited herein.
The STO circuit in this application embodiment allies oneself with accuse through safety switch and second control terminal for only safety switch is closed, and when second control terminal sent the operation instruction simultaneously, the STO circuit could be in effective output state, and then makes the operation of first control terminal control motor, thereby has further realized the security of motor operation.
The STO circuit control system in the embodiment of the present application is described in detail below. In the following description, the safety circuit can be divided into a high-voltage safety circuit and a low-voltage safety circuit according to the rated voltage of the safety circuit 101, and the STO circuit control system is divided into two cases:
firstly, a high-voltage safety circuit:
referring to fig. 3, another embodiment of the STO circuit control system of the embodiment of the present application includes: high voltage safety circuit 107, run output relay 102, STO circuit 103, first control terminal 104, second control terminal 106, motor 105, and safety relay 109.
Wherein, the high voltage safety circuit 107 comprises a high voltage safety switch 1071 for ensuring the safety of the high voltage safety circuit; the safety relay 109 includes a second control circuit 1092 and a second normally open contact 1091, and the operation output relay 102 includes a first control circuit 1022 and a first normally open contact 1021.
The high-voltage safety switch 1071 is connected in series with the second control circuit 1092 of the safety relay 109, so that when the high-voltage safety circuit 107 is turned on, the armature of the safety relay 109 is attracted, the second normally open contact 1091 of the safety relay 109 is closed, and a prerequisite condition for the turn-on of the STO circuit 103 is provided.
The second normally open contact 1091, the first normally open contact 1021, and the STO circuit 103 are connected in series. The first control circuit 1022 of the operation output relay 102 corresponding to the first normally open contact 1021 is connected to the second control terminal 106, so that when the second control terminal 106 sends an operation instruction, the armature of the operation output relay 102 is attracted, and the first normally open contact 1021 is closed.
A signal output of the STO circuit 103 is connected to said first control terminal 104 for enabling the first control terminal 104 to determine whether the STO circuit 103 is conducting or not. The first control terminal 104 is connected to the motor 105 to control the operation of the motor 105.
In this embodiment, the rated voltage of the high-voltage safety circuit 107 may be 110 volts or 220 volts, which is not limited herein.
In this embodiment, the safety relay 109 may be an electromagnetic relay, or may also be a relay that can realize a safety function, such as a solid-state relay, and is not limited herein.
The following explains the operation principle of the STO circuit control system in this embodiment, specifically as follows:
when the circuit normally works, the high-voltage safety switch 1071 of the high-voltage safety circuit 107 is in a closed state, the high-voltage safety circuit 107 is conducted, the safety relay 109 acts, the armature of the safety relay attracts under the action of the magnetic field, and the second normally-open contact 1091 of the safety relay 109 is driven to act, namely, is closed. When a user operates the second control terminal 106 to send an instruction for operating the motor 105, the operation output relay 102 connected with the second control terminal 106 acts, and the armature of the operation output relay 102 is attracted to close the first normally open contact 1021. When the first normally-open contact 1021 is closed and the second normally-open contact 1091 is closed, the STO circuit 103 is turned on, and a signal output end of the STO circuit 103 outputs a signal. If the first control terminal 104 detects that the signal output terminal of the STO circuit 103 is valid, it is determined that the STO circuit 103 is valid, i.e., the STO circuit 103 is turned on. The first control terminal 104 then drives the control motor 105 to operate.
When at least one of the high-voltage safety switches 1071 of the high-voltage safety circuit 107 is in an off state, the high-voltage safety circuit 107 is turned off, the second normally open contact 1091 of the safety relay 109 is turned off, and the STO circuit 103 is not turned on. Alternatively, when the second normally open contact 1091 is closed and the second control terminal 106 does not receive the operation command, the first normally open contact 1021 is not closed, and the STO circuit 103 is not conducted.
Referring to fig. 4, in the present embodiment, the STO circuit 103 may specifically include a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a second capacitor C2, an isolation optocoupler IC1, and a not gate a 2.
The first end of the first resistor R1 is an input end of the STO circuit 103, the second end of the first resistor R1 is respectively connected with the first end of the first diode D1 and the second end of the second diode D2, the second end of the first diode D1 is respectively connected with the second end of the fourth diode D4, the second end of the second resistor R2, the second end of the first capacitor C1 and the first end of the isolation optocoupler IC1, and the first end of the isolation optocoupler IC1 is used as an input end of the isolation optocoupler IC 1.
A second end of the third diode D3 is connected to a first end of the fourth diode D4, a second end of the third diode D3 serves as an output end of the STO circuit, and a first end of the third diode D3 is connected to a first end of the second diode D2, a first end of the second resistor R2, a first end of the first capacitor C1 and a second end of the isolation optocoupler IC 1;
the third end of the isolation optocoupler IC1 is grounded, the fourth end of the isolation optocoupler IC1 is connected with the first end of the third resistor R3, the first end of the fourth diode D4 and the first end of the fifth resistor R5 respectively, and the second end of the third resistor R3 and the second end of the fourth diode D4 are connected to serve as a five-volt voltage input end;
a second end of the fifth resistor R5 is respectively connected to the first end of the second capacitor C2 and the third end of the not gate a2, and a second end of the second capacitor C2 is grounded;
the second terminal of the not gate a2 is grounded, the fourth terminal of the not gate a2 is the signal output terminal of the not gate a2, and the fifth terminal of the not gate a2 is the three-point three-volt input terminal.
The following describes the operation of STO circuit 103, specifically as follows:
the voltage input end of the STO circuit 103 has an input signal, and the input signal passes through the first diode D1 and is input into the isolation optocoupler IC1 after being filtered by the first capacitor C1. The first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 can prevent circuit faults caused by reverse connection of the first end and the second end of the isolation optocoupler IC 1. And a light emitting diode in the isolation optocoupler IC1 outputs an optical signal to a phototriode of the isolation optocoupler IC1 after receiving an input signal, and then outputs an electrical signal. The electric signal is shaped by a not gate a2, and a final signal is output.
In this embodiment, the STO circuit 103 shown in fig. 4 may further include a light emitting diode D5, please refer to fig. 5.
A second terminal of the third resistor R3 is connected to a second terminal of the led D5 as a five volt input terminal, and a first terminal of the led D5 is connected to a second terminal of the fourth diode D4. Light emitting diode D5 may indicate whether the STO circuit is operating properly.
In this embodiment, the STO circuit 103 shown in fig. 5 can further include a sixth resistor R6 and a third capacitor C3, see fig. 6.
The first end of the sixth resistor R6 is connected to the fourth end of the nand gate a2, the second end of the sixth resistor R6 is connected to the first end of the third capacitor C3, the second end of the sixth resistor R6 is a signal output end, and the second end of the third capacitor C3 is grounded. The sixth resistor R6 and the third capacitor C3 may be used to filter the output signal of the not gate a2, ensuring that the first control terminal detects properly.
II, a low-voltage safety circuit:
referring to fig. 7, another embodiment of the STO circuit control system of the embodiment of the present application includes: low voltage safety circuit 108, run output relay 102, STO circuit 103, first control terminal 104, second control terminal 106, and motor 105.
The low voltage safety circuit 108 includes a low voltage safety switch 1081, and the low voltage safety switch 1081 can ensure the safety of the circuit. The low-voltage safety switch 1081, the first normally-open contact 1021, and the STO circuit 103 are connected in series. The first control circuit 1022 of the operation output relay 102 corresponding to the first normally open contact 1021 is connected to the second control terminal 106, so that when the second control terminal 106 sends an operation instruction, the armature of the operation output relay 102 is attracted, and the first normally open contact 1021 is closed.
A signal output of the STO circuit 103 is connected to said first control terminal 104 for enabling the first control terminal 104 to determine whether the STO circuit 103 is conducting or not. The first control terminal 104 is connected to the motor 105 to control the operation of the motor 105.
The following explains the operation principle of the STO circuit control system in this embodiment, specifically as follows:
when the circuit is operating normally, the low voltage safety switch 1081 of the low voltage safety circuit 108 is in a closed state. When a user operates the second control terminal 106 to send an instruction for operating the motor 105, the operation output relay 102 connected with the second control terminal 106 acts, and the armature of the operation output relay 102 is attracted to close the first normally open contact 1021. When the low-voltage safety switch 1081 is closed and the first normally-open contact 1021 is closed, the STO circuit 103 is turned on, and a signal output end of the STO circuit 103 outputs a signal. If the first control terminal 104 detects that the signal output terminal of the STO circuit 103 is valid, it is determined that the STO circuit 103 is valid, i.e., the STO circuit 103 is turned on. The first control terminal 104 then drives the control motor 105.
The STO circuit 103 is non-conductive when at least one of the low voltage safety switches 1081 of the low voltage safety circuit 108 is in an open state. Alternatively, when the low-voltage safety switch 1081 is closed but the second control terminal 106 does not receive the operation command, the first normally open contact 1021 is not closed, and the STO circuit 103 is not conducted.
In this embodiment, the STO circuit 103 is similar to that described in fig. 4, 5 and 6, and is not described again here.
In the above embodiment, the connection relationship between the STO circuit in the high-voltage circuit and the low-voltage circuit is described in detail, so that the implementability of the embodiment of the application is improved, and the safety of the motor is further improved.
The STO circuit control system provided by the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. An STO circuit control system, comprising:
the control system comprises a safety circuit, an operation output relay, an STO circuit, a first control terminal and a motor;
the safety circuit includes: a safety switch;
the operation output relay comprises a first control circuit and a first normally open contact, and the first control circuit is used for receiving a control signal;
the first normally-open contact is connected between the voltage input end of the STO circuit and a reference voltage in series, and the voltage output end of the STO circuit is connected with a zero voltage end;
the safety switch is connected with the first normally open contact;
the signal output end of the STO circuit is connected with the first control terminal;
the first control terminal is connected with the motor;
and if the first control terminal detects an effective signal of the STO circuit, driving the motor to operate.
2. An STO circuit control system as claimed in claim 1 further comprising:
a second control terminal;
the second control terminal is connected with the first control circuit of the operation output relay and used for receiving a control signal;
and if the second control terminal sends an operation instruction, the armature of the operation output relay is attracted, so that the first normally open contact is closed.
3. An STO circuit control system as claimed in claim 2,
the safety circuit is a low-voltage safety circuit;
the low voltage safety circuit includes: a low voltage safety switch;
the low-voltage safety switch is connected with the first normally-open contact in series.
4. An STO circuit control system as claimed in claim 2 further comprising: the safety relay comprises a second control circuit and a second normally open contact;
the safety circuit is a high-voltage safety circuit;
the high voltage safety circuit includes: a high voltage safety switch;
the high-voltage safety switch is connected in series with a second control circuit of the safety relay, and the second normally-open contact is connected in series with the first normally-open contact.
5. An STO circuit control system according to any one of claims 1 to 4,
the first control terminal is a computer or a single chip microcomputer;
the second control terminal is a computer or a single chip microcomputer.
6. An STO circuit control system according to any one of claims 1 to 4,
the safety relay is an electromagnetic relay or a solid-state relay.
7. An STO circuit control system according to any one of claims 1 to 4,
the motor is a servo motor or a stepping motor.
8. An STO circuit control system according to any one of claims 1-4, wherein the STO circuit comprises:
the circuit comprises a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a first capacitor (C1), a second capacitor (C2), an isolation optocoupler (IC1) and an NOT gate (A2);
a first end of the first resistor (R1) is an input end of the STO circuit, a second end of the first resistor (R1) is respectively connected with a first end of the first diode (D1) and a second end of the second diode (D2), a second end of the first diode (D1) is respectively connected with a second end of the fourth diode (D4), a second end of the second resistor (R2), a second end of the first capacitor (C1) and a first end of the isolation optical coupler (IC1), and a first end of the isolation optical coupler (IC1) is an input end of the isolation optical coupler (IC 1);
a second terminal of the third diode (D3) is connected to a first terminal of the fourth diode (D4), a second terminal of the third diode (D3) serves as an output terminal of the STO circuit, and a first terminal of the third diode (D3) is respectively connected to a first terminal of the second diode (D2), a first terminal of the second resistor (R2), a first terminal of the first capacitor (C1), and a second terminal of the isolation optocoupler (IC 1);
the third end of the isolation optocoupler (IC1) is grounded, the fourth end of the isolation optocoupler (IC1) is respectively connected with the first end of the third resistor (R3), the first end of the fourth diode (D4) and the first end of the fifth resistor (R5), and the second end of the third resistor (R3) and the second end of the fourth diode (D4) are connected to serve as a five-volt voltage input end;
a second end of the fifth resistor (R5) is respectively connected with a first end of the second capacitor (C2) and a third end of the NOT gate (A2), and a second end of the second capacitor (C2) is grounded;
the second end of the NOT gate (A2) is grounded, the fourth end of the NOT gate (A2) is the signal output end of the NOT gate (A2), and the fifth end of the NOT gate (A2) is used as a three-point three-volt input end.
9. An STO circuit control system as claimed in claim 8, wherein the STO circuit further comprises:
a light emitting diode (D5);
a second terminal of the third resistor (R3) and a second terminal of the light emitting diode (D5) are connected as a five-volt input terminal, and a first terminal of the light emitting diode (D5) is connected to a second terminal of the fourth diode (D4).
10. An STO circuit control system as claimed in claim 9, wherein the STO circuit further comprises:
a sixth resistor (R6) and a third capacitor (C3);
the first end of the sixth resistor (R6) is connected with the fourth end of the NOT gate (A2), the second end of the sixth resistor (R6) is connected with the first end of the third capacitor (C3), the second end of the sixth resistor (R6) is a signal output end, and the second end of the third capacitor (C3) is grounded.
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| CN202110914237.0A CN113572399A (en) | 2021-08-10 | 2021-08-10 | STO circuit control system |
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| CN202110914237.0A CN113572399A (en) | 2021-08-10 | 2021-08-10 | STO circuit control system |
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| CN206878449U (en) * | 2017-06-23 | 2018-01-12 | 沈阳市蓝光自动化技术有限公司 | A kind of motor safety torque turning off system based on safety circuit |
| US20180327215A1 (en) * | 2017-05-15 | 2018-11-15 | Kone Corporation | Current cut-off arrangement of an elevator |
| US20200117160A1 (en) * | 2017-02-21 | 2020-04-16 | Omron Corporation | Servo system |
-
2021
- 2021-08-10 CN CN202110914237.0A patent/CN113572399A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104355195A (en) * | 2014-10-27 | 2015-02-18 | 中山市卓梅尼控制技术有限公司 | Safe torque off circuit and elevator safety control system |
| CN105576952A (en) * | 2015-12-30 | 2016-05-11 | 深圳市英威腾电气股份有限公司 | Safe torque off (STO) control circuit and system |
| US20200117160A1 (en) * | 2017-02-21 | 2020-04-16 | Omron Corporation | Servo system |
| US20180327215A1 (en) * | 2017-05-15 | 2018-11-15 | Kone Corporation | Current cut-off arrangement of an elevator |
| CN108861902A (en) * | 2017-05-15 | 2018-11-23 | 通力股份公司 | The failure of current device of elevator |
| CN206878449U (en) * | 2017-06-23 | 2018-01-12 | 沈阳市蓝光自动化技术有限公司 | A kind of motor safety torque turning off system based on safety circuit |
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