Stepping motor control circuit of filling machine
By introducing contactors and PLC controllers into the stepper motor control circuit of the filling machine, the current of the stepper motor is cut off in the non-production state, solving the problem of power loss and shortening of the service life of the stepper motor due to continuous power-on, significantly extending the service life of the motor and bearings and increasing the protection function of the circuit.
Patent Information
- Application Number
- CN202421513533.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-28
AI Technical Summary
In the non-production state, the stepper motors of the existing filling machine are poorly dissipated due to continuous power-on, resulting in electrical energy loss and shortening the service life of the motor bearings.
A filling machine stepper motor control circuit is designed to cut off the current of the stepper motor through the contactor, combine the protection switch to prevent circuit failure, and use the PLC controller to control the contactor to power outage in the non-production state.
It effectively reduces the power loss of stepper motors in non-production states, extends the service life of stepper motors and motor bearings, and increases the protection function of the circuit to prevent overload, short circuit and other faults.
Smart Images
Figure CN222928302U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of circuit control, and particularly relates to a stepping motor control circuit for a filling machine. Background Technique
[0002] A stepping motor is an open-loop control component that converts a given electrical pulse signal into an angular displacement or linear displacement. Given an electrical pulse signal, the rotor of the stepping motor rotates by a corresponding angle. Due to this linear relationship between the electrical pulse signal and the stepping motor rotation angle, precise positioning can be achieved, making the stepping motor widely used in dairy filling machines.
[0003] In a dairy filling machine, using a stepping motor to drive the actuator can not only simplify the structure of the filling machine, make the adjustment convenient, increase the reliability, but also greatly improve the accuracy.
[0004] The filling machine in the prior art uses a three-phase stepping motor, which has three groups of coils. Its working state can be divided into a production state and a non-production state. In the production state, the three groups of coils of the stepping motor are energized to make the motor rotate, and at the same time, the heat generated by the coils is carried away with the rotation of the motor, and the temperature rise of the stepping motor is normal; in the non-production state, the stepping motor stops and remains, and at this time, the driver will send a working current to inhibit the rotation of the stepping motor, and this current will cause the motor to continuously heat up. Since the stepping motor stops, poor heat dissipation leads to abnormal temperature rise of the motor. At the same time, the leakage current of the driver connected to the stepping motor also causes the problem of the stepping motor heating up, which not only causes power loss, but also shortens the service life of the stepping motor and the stepping motor bearing. Content of the Utility Model
[0005] The utility model aims to provide a stepping motor control circuit for a filling machine, which cuts off the power supply of the stepping motor when the filling machine is in the non-production state, reduces power consumption, and prolongs the service life of the stepping motor and the motor bearing.
[0006] To achieve the above object, the technical solution adopted by the utility model is as follows:
[0007] A stepping motor control circuit for a filling machine includes a contactor, a transformer, a stepping motor, a driver, and a controller. The power signal input end of the contactor is connected to an external main power line, and the power signal output end is connected to the input end of the driver through the transformer; the drive signal output end of the driver is connected to the drive signal input end of the stepping motor; the control signal output end of the controller is connected to the contactor.
[0008] As a limitation, it further includes a protection switch, and the protection switch is connected in series between the external main power line and the line connected to the contactor.
[0009] As a second limitation, the transformer includes a first coupling coil connected to a contactor, a second coupling coil and a third coupling coil connected to a driver; the driver includes a first pin to a seventeenth pin;
[0010] The first coupling coil is coupled to the second coupling coil and the third coupling coil;
[0011] Both ends of the second coupling coil are respectively connected to the second pin and the third pin of the driver, and both ends of the third coupling coil are respectively connected to the fourth pin and the fifth pin of the driver.
[0012] As a third limitation, the stepper motor is a three-phase six-wire stepper motor, and the six wires of the stepper motor are sequentially connected to the sixth pin to the eleventh pin of the driver.
[0013] Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects obtained by the present utility model are as follows:
[0014] (1) When the external main power supply is not disconnected, the present utility model can cut off the current flowing through the stepper motor by cutting off the contactor, saving power loss while extending the service life of the stepper motor and the bearings of the stepper motor; in the specific implementation process, the no-load current of the stepper motor is 0.16 A, there are two stepper motors in each filling machine, the no-load current is 0.32 A, and the power is 70.4 W. There are four filling machines in a production line in the workshop, and the total power is 281.6 W. In the non-production state, the PLC controller controls to cut off the contactor, saving 6.76 KWh of electric energy per day and 202.7 KWh of electric energy per month, realizing energy saving and efficiency improvement; before using this embodiment, two stepper motors were damaged on average every year, and the bearings of the stepper motors were replaced once a year. After using this embodiment, no damage occurred in one year, and the service life of the stepper motor was significantly extended;
[0015] (2) The present utility model adds a protection circuit to prevent the stepper motor from being damaged when the circuit has overload, short-circuit, overvoltage, and leakage faults.
[0016] In summary, the present utility model can solve the problems that the stepper motor is always powered on in the non-production state, resulting in power loss and short service lives of the motor and the motor bearings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.
[0018] Figure 1 It is a schematic circuit structure diagram of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] To better explain the present utility model for easy understanding, the preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings through specific implementation manners.
[0020] Embodiment: Stepper Motor Control Circuit of Filling Machine
[0021] As Figure 1 shown, this embodiment includes a protection switch QM1, a contactor KM, a transformer TC1, a driver BDY, and a stepper motor M1. The transformer TC1 includes a first coupling coil AC1 to a third coupling coil AC3; the model of the driver BDY is STEP DRIVER SH-3F110M, which includes a first pin to a seventeenth pin. This embodiment also includes a PLC controller, and the control signal output terminal of the PLC controller is connected to the contactor KM to control the on and off of the contactor KM.
[0022] The power signal input terminal of the protection switch QM1 is connected to the external main power line, and the power signal output terminal is connected to both ends of the first coupling coil AC1 of the transformer TC1 through the contactor KM. The first coupling coil AC1 is coupled to the second coupling coil AC2 and the third coupling coil AC3. Both ends of the second coupling coil AC2 are respectively connected to the second pin and the third pin of the driver BDY; both ends of the third coupling coil AC3 are respectively connected to the fourth pin and the fifth pin.
[0023] The first pin of the driver BDY is grounded, and the fourteenth pin FREE offline signal terminal is connected to the external PLC controller through a series resistor R1. When the offline signal FREE is at a low level, the current output by the driver to the motor is cut off, and the motor rotor is in a free state, that is, the offline state. The fifteenth pin DIR terminal is connected to the PLC controller to control the direction of the stepper motor; the sixteenth pin CP pulse signal terminal is connected to the external PLC controller through a series resistor R2 to control the speed of the stepper motor. The stepper motor will rotate the corresponding number of turns according to the number of pulse signals sent by the PLC.
[0024] The stepper motor M1 in this embodiment is a three-phase six-wire stepper motor. The six wires of the stepper motor M1 are sequentially connected to the sixth pin to the eleventh pin of the driver BDY through the terminal block JX1 and the terminal block JX6.
[0025] When this embodiment is in use, if the stepper motor of the filling machine is in a non-production state, the PLC controller outputs a control signal to control the contactor KM to disconnect, thereby cutting off the current flowing through the stepper motor M1.
Claims
1. A filling machine stepper motor control circuit, characterized in that: It includes a contactor, a transformer, a stepper motor, a driver and a controller. The power signal input end of the contactor is connected to an external main power line, and the power signal output end is connected to the input end of the driver through a transformer; the drive signal output end of the driver is connected to the drive signal input end of the stepper motor; and the control signal output end of the controller is connected to the contactor.
2. The filling machine stepper motor control circuit according to claim 1 is characterized in that: It also includes a protection switch, which is connected in series between the external main power line and the line connected to the contactor.
3. The filling machine stepper motor control circuit according to claim 2 is characterized in that: The transformer includes a first coupling coil connected to the contactor, a second coupling coil and a third coupling coil connected to the driver; the driver includes a first pin to a seventeenth pin; The first coupling coil is coupled to the second coupling coil and the third coupling coil; Two ends of the second coupling coil are connected to the second pin and the third pin of the driver respectively, and two ends of the third coupling coil are connected to the fourth pin and the fifth pin of the driver respectively.
4. The filling machine stepper motor control circuit according to claim 3, characterized in that: The stepper motor is a three-phase six-wire stepper motor, and the six wires of the stepper motor are sequentially connected to the sixth to eleventh pins of the driver.