Industrial wireless remote controller with speed change function control
By using IGBT/MOSFET semiconductor power devices and EMC protection circuits in the wireless remote controller, the problems of mechanical contact arcing and surge voltage were solved, enabling motor speed control and real-time status monitoring, thus improving the safety and flexibility of the equipment.
Patent Information
- Application Number
- CN202422966812.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing wireless remote controls suffer from problems such as electric arcing at mechanical contacts, surge voltage, lack of speed control, insufficient temperature and current monitoring, lack of power supply voltage detection, unintuitive status indication, and insufficient battery power, which affect the safety and flexibility of the equipment.
IGBT/MOSFET semiconductor power devices are used as electronic switches to achieve arc-free start-stop control, and EMC protection circuits and power supply voltage sampling circuits ensure stable motor operation. Combined with limit switches, temperature and current detection circuits, it provides real-time status monitoring and speed change functions. The hand-held control box MCU displays battery level and ambient temperature to ensure stable operation of the equipment in complex electromagnetic environments.
It improves equipment lifespan and reliability, avoids damage from electric arcs and surge voltages, enables intuitive display of motor speed regulation and status information, ensures motor operation within a safe voltage range, and enhances operational safety and flexibility.
Smart Images
Figure CN223582564U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to industrial wireless remote controller technical field, especially a kind of industrial wireless remote controller with variable speed function control. BACKGROUND
[0002] Electric hoist and light crane have been widely used in various aspects of production and life. The power source of these devices is usually provided by the motor equipped with it. Among them, a type of crane uses a series motor. Series motor is a kind of AC / DC motor, and its advantages include high speed, large starting torque, small size, light weight, not easy to stall, wide applicable voltage range, etc. Therefore, the crane using series motor as power source is gradually widely used due to its small size, easy installation, convenient carrying, strong power adaptability, low cost, AC / DC universal, etc.
[0003] Initially, the operating handle of the crane controller and the controller host are connected by wire, and the host is installed on or beside the motor body structure of the crane. When operating, the operator must stand near the host of the crane, and the use scene is limited. Since some cranes are installed at high places of scaffolding, there is a safety risk for the operator to stand beside or below.
[0004] Later, industrial wireless remote controller was developed, which removed the cable connection between the hand control box and the host, and used wireless signal for crane control operation. Wireless communication is adopted between the hand control box and the host, which expands the control distance, and the operator can control the crane operation without standing beside the machine, greatly facilitating the operator, improving the use safety, and expanding the use scene.
[0005] The existing wireless controller still has some shortcomings:
[0006] 1. Mechanical contact problem: The traditional mechanical contact control method will produce electric arc when the motor starts and stops, which will cause contact ablation, adhesion, and even cause safety accidents.
[0007] 2. Surge voltage problem: The electric arc generated by mechanical contact control may produce surge voltage of thousands or even tens of thousands of volts, which not only damages the electronic components inside the controller, but also affects the normal work of other surrounding equipment.
[0008] 3. Lack of speed control: Most existing wireless controllers can only realize the forward and reverse rotation start-stop control of the motor, and cannot adjust the motor speed, which limits the flexibility of the crane when micro-adjustment or rapid lifting is needed.
[0009] 4. Insufficient temperature and current monitoring: Lack of monitoring of motor operating temperature and current may cause motor overheating or overload, affecting service life and even causing safety accidents.
[0010] 5. Power supply voltage detection missing: existing wireless controllers usually do not have power supply voltage detection function, and cannot deal with the problem of non-standard power consumption on the construction site, such as incorrect voltage level or cable impedance leading to under-voltage operation.
[0011] 6. Non-intuitive state indication: the state indication on the hand control box is usually limited to LED lights, with limited information display, which is not convenient for operators to understand the device status in real time.
[0012] 7. Battery power problem: when the battery power of the hand control box is insufficient, it may cause unstable control signal transmission, affecting the normal operation of the crane. Utility model content
[0013] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an industrial wireless remote controller with variable speed function control, which is used to solve the problems of arc, surge voltage and the like generated by mechanical contact.
[0014] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides the following technical scheme:
[0015] An industrial wireless remote controller with variable speed function control, comprising a hand control box, a host installed on a crane and in wireless communication with the hand control box, the host comprising a host MCU, a motor for driving the crane to run, and a motor drive circuit connected to the motor; the motor drive circuit receives the control signal of the host MCU and controls the operation of the motor through the IGBT / MOSFET drive circuit.
[0016] The above-mentioned technical scheme is realized, the hand control box exchanges information with the host installed on the crane through wireless communication technology, the host MCU serves as a control center, receives wireless instructions from the hand control box, analyzes and generates corresponding control signals according to the instructions, the motor drive circuit receives the control signal sent by the host MCU, and controls the operation of the motor through the IGBT / MOSFET drive circuit; by using IGBT / MOSFET and other semiconductor power devices as electronic switches, the motor start-stop control does not generate arc, the service life is greatly improved, and there is no mechanical fatigue; by using IGBT / MOSFET and other semiconductor power devices as electronic switches, the motor start-stop control does not generate arc, and does not generate surge voltage, which does not cause overvoltage damage to the controller itself, and does not affect the normal work of other surrounding equipment; by using IGBT / MOSFET and other semiconductor power devices as electronic switches, the control switch frequency can be very high, and PWM (pulse width modulation) control of the motor speed can be realized, so as to realize the variable speed function of the crane and further realize the flexible control of the load position of the crane.
[0017] In an embodiment of the utility model, input power is connected with the host computer MCU through EMC protection circuit and power voltage sampling circuit.
[0018] The input power of the industrial wireless remote controller is first connected with the EMC protection circuit to ensure the stability and purity of the power supply, and then the power voltage protected by the EMC protection circuit is sent to the power voltage sampling circuit, which is responsible for real-time monitoring of the power voltage to ensure that it is within a safe and stable range.
[0019] In an embodiment of the utility model, the EMC protection circuit is further connected with an AC / DC converter, the AC / DC converter is connected with the host computer MCU through a DC / DC converter and a direct current bus voltage sampling circuit, and the output end of the AC / DC converter is connected with the IGBT / MOSFET drive circuit and the motor drive circuit.
[0020] The AC power protected by the EMC protection circuit is sent to the AC / DC converter to convert the AC power into DC power, the DC power output by the AC / DC converter is further adjusted in voltage by the DC / DC converter to meet the specific voltage requirements of the host computer MCU and other circuits, the voltage output by the DC / DC converter is sent to the direct current bus voltage sampling circuit, the circuit monitors the direct current bus voltage and feeds back the voltage information to the host computer MCU, and the host computer MCU receives the voltage information from the direct current bus voltage sampling circuit, processes and controls the decision to ensure that the motor drive circuit and the IGBT / MOSFET drive circuit work under appropriate voltage.
[0021] In an embodiment of the utility model, the host computer MCU and the motor are connected with a limit switch monitoring circuit, a motor temperature detection circuit and a motor current detection circuit.
[0022] The limit switch monitoring circuit, the motor temperature detection circuit and the motor current detection circuit respectively collect the limit state, the motor temperature and the motor current data of the crane, the host computer MCU receives these signals and transmits them to the hand control box through wireless communication, and the hand control box MCU converts the received signals into information readable by the user and displays them on the OLED display screen.
[0023] In an embodiment of the utility model, the hand control box includes a hand control box MCU, a control button connected with the hand control box MCU, a hand control box end radio frequency transceiver unit and an LED indicator.
[0024] The hand control box MCU is a central processing unit of the hand control box, the control button is connected with the hand control box MCU, allowing an operator to input instructions such as starting, stopping, accelerating and decelerating, and the LED indicator is used to provide visual feedback such as indicating the working state of the hand control box, the battery capacity and the signal strength.
[0025] In an embodiment of the utility model, the hand control box MCU is further connected with a battery power supply management unit, an environmental temperature detection unit and an OLED display screen for displaying the battery capacity and the environmental temperature.
[0026] The battery power supply management unit is responsible for monitoring and managing the battery state of the hand control box, including the battery capacity, the charging state and the battery health degree; the environmental temperature detection unit is used to detect the temperature inside the hand control box or the surrounding environment thereof to ensure that the equipment works within a suitable temperature range; and the OLED display screen is used to display the battery capacity, the environmental temperature and possible other running state information of the hand control box, providing an intuitive user interface.
[0027] In an embodiment of the utility model, the host further includes a state indication circuit connected with the host MCU, a control circuit for connecting the button and the control handle and a host end radio frequency transceiver unit for wireless communication with the hand control box end radio frequency transceiver unit.
[0028] The state indication circuit is connected with the host MCU and is used to display the working state of the host such as the power state, the fault state and the running mode; the control circuit is used to connect the button and the control handle, allowing an operator to input control instructions through a physical interface; and the host end radio frequency transceiver unit is responsible for wireless communication with the hand control box end radio frequency transceiver unit, realizing the reception and transmission of remote control signals.
[0029] As described above, the industrial wireless remote controller with variable speed function control has the following beneficial effects: by using semiconductor power devices such as IGBT / MOSFET as electronic switches, motor start-stop control does not produce electric arc, avoiding problems such as mechanical contact ablation and sticking, greatly improving the service life and reliability of the equipment; since no electric arc is generated, no surge voltage is generated, avoiding overvoltage damage to the controller itself and other electronic components, while also reducing interference to surrounding equipment and improving system stability; the host end monitors the operating temperature, current and power voltage of the motor in real time, and can take protective measures in time when the safety threshold is exceeded, avoiding motor overheating, overcurrent and under-voltage operation, and prolonging the service life of the motor; the OLED screen display unit on the hand control box can intuitively display information such as the operating state of the motor, battery capacity and environmental temperature, and the operator can real-time understand the operation of the equipment; the hand control box and the host have good EMC protection design, ensuring stable work in complex electromagnetic environment. BRIEF DESCRIPTION OF DRAWINGS
[0030] Fig. 1 The structure diagram of the utility model is shown.
[0031] Fig. 2 The structure diagram of the hand control box is shown.
[0032] Fig. 3 The structure diagram of the host is shown. DETAILED DESCRIPTION
[0033] The following specific embodiments illustrate the implementation of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. It should be noted that the following examples and features in the examples can be combined with each other without conflict.
[0034] Please refer to Figs. 1 to 3 The utility model provides a kind of industrial wireless remote controller with variable speed function control, including hand control box, host computer installed on crane and with the hand control box wireless communication, the host computer includes host computer MCU, motor for driving crane operation and motor drive circuit connected with the motor;The motor drive circuit receives the control signal of the host computer MCU and controls the operation of motor by IGBT / MOSFET drive circuit.
[0035] The hand control box exchanges information with the host installed on the crane through wireless communication technology. The host MCU serves as a control center, receives wireless instructions from the hand control box, analyzes and generates corresponding control signals according to the instructions, the motor drive circuit receives the control signals sent by the host MCU, and controls the operation of the motor through the IGBT / MOSFET drive circuit. By using semiconductor power devices such as IGBT / MOSFET as electronic switches, the motor start-stop control does not generate electric arc, greatly improves the service life, and does not cause mechanical fatigue. By using semiconductor power devices such as IGBT / MOSFET as electronic switches, the motor start-stop control does not generate electric arc and does not generate surge voltage, which does not cause overvoltage damage to the controller itself and does not affect the normal work of other surrounding equipment. By using semiconductor power devices such as IGBT / MOSFET as electronic switches, the control switching frequency can be very high, and PWM (pulse width modulation) control of the motor speed can be realized, thereby realizing the variable speed function of the crane and further realizing the flexible control of the load position of the crane.
[0036] The input power is connected to the host MCU through an EMC protection circuit and a power voltage sampling circuit. The input power of the industrial wireless remote controller first passes through an EMC (electromagnetic compatibility) protection circuit to ensure the stability and purity of the power supply. The power voltage protected by the EMC protection circuit is then sent to the power voltage sampling circuit, which is responsible for monitoring the power voltage in real time to ensure that it is within a safe and stable range. The power voltage sampling circuit transmits the monitored voltage information to the host MCU. The host MCU processes the information to ensure that the motor drive circuit and the IGBT / MOSFET drive circuit work at appropriate voltages.
[0037] The EMC protection circuit is also connected to an AC / DC converter, which is connected to the host MCU through a DC / DC converter and a DC bus voltage sampling circuit. The output of the AC / DC converter is connected to the IGBT / MOSFET drive circuit and the motor drive circuit.
[0038] The AC power protected by the EMC protection circuit is sent to the AC / DC converter to convert AC power to DC power. The DC power output by the AC / DC converter is further adjusted in voltage by the DC / DC converter to meet the specific voltage requirements of the host MCU and other circuits. The voltage output by the DC / DC converter is sent to the DC bus voltage sampling circuit, which monitors the DC bus voltage and feeds back voltage information to the host MCU. The host MCU receives the voltage information from the DC bus voltage sampling circuit, processes and controls the decision to ensure that the motor drive circuit and the IGBT / MOSFET drive circuit work at appropriate voltages.
[0039] The limit switch monitoring circuit, the motor temperature detection circuit and the motor current detection circuit are connected between the host MCU and the motor. The limit switch monitoring circuit is connected between the host MCU and the motor, and is used for detecting whether the physical position of the crane reaches the preset upper limit or lower limit. The limit switch monitoring circuit, the motor temperature detection circuit and the motor current detection circuit respectively collect the limit state, the motor temperature and the motor current data of the crane. The host MCU receives these signals, and transmits the signals to the hand control box through wireless communication. The hand control box MCU converts the received signals into information readable by the user, and displays the information on the OLED display screen.
[0040] The hand control box comprises a hand control box MCU, control buttons connected with the hand control box MCU, a hand control box end radio frequency transceiver unit and an LED indicator. The hand control box MCU is the central processing unit of the hand control box. The control buttons are connected with the hand control box MCU, and allow the operator to input instructions, such as starting, stopping, accelerating and decelerating. The LED indicator is used for providing visual feedback, such as indicating the working state of the hand control box, the battery capacity and the signal strength.
[0041] The hand control box MCU is further connected with a battery power supply management unit, an environmental temperature detection unit and an OLED display screen used for displaying the battery capacity and the environmental temperature. The battery power supply management unit is responsible for monitoring and managing the battery state of the hand control box, including the battery capacity, the charging state and the battery health degree. The environmental temperature detection unit is used for detecting the temperature of the inside or the surrounding environment of the hand control box, so as to ensure that the device works in a suitable temperature range. The OLED display screen is used for displaying the battery capacity, the environmental temperature and possible other running state information of the hand control box, and provides an intuitive user interface.
[0042] The host further comprises a state indication circuit connected with the host MCU, a control circuit used for connecting buttons and a control handle and a host end radio frequency transceiver unit in wireless communication with the hand control box end radio frequency transceiver unit. The state indication circuit is connected with the host MCU, and is used for displaying the working state of the host, such as the power state, the fault state and the running mode. The control circuit is used for connecting the buttons and the control handle, and allows the operator to input control instructions through the physical interface. The host end radio frequency transceiver unit is responsible for wireless communication with the hand control box end radio frequency transceiver unit, and realizes the reception and transmission of the remote control signals.
[0043] The above embodiments only exemplarily illustrate the principle and the effect of the utility model, and are not used for limiting the utility model. All equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should still be covered by the claims of the utility model.
Claims
1. An industrial wireless remote controller with variable function control, comprising a hand control box and a main unit installed on a crane and wirelessly communicating with the hand control box, characterized in that: The host includes a host MCU, a motor for driving the crane to run, and a motor driving circuit connected to the motor; The motor driving circuit receives the control signal of the host MCU and controls the running of the motor through an IGBT / MOSFET driving circuit; An input power supply is connected to the host MCU through an EMC protection circuit and a power voltage sampling circuit; The EMC protection circuit is also connected to an AC / DC converter, which is connected to the host MCU through a DC / DC converter and a direct current bus voltage sampling circuit; The output end of the AC / DC converter is connected to the IGBT / MOSFET driving circuit and the motor driving circuit; The host MCU and the motor are connected to a limit switch monitoring circuit, a motor temperature detection circuit, and a motor current detection circuit.
2. The industrial wireless remote controller with variable speed function control according to claim 1, characterized in that: The hand control box includes a hand control box MCU, control buttons connected to the hand control box MCU, a hand control box end radio frequency transceiver unit, and an LED indicator light.
3. The industrial wireless remote controller with variable speed function control according to claim 2, characterized in that: The hand control box MCU is also connected to a battery power supply management unit, an environmental temperature detection unit, and an OLED display screen for displaying the battery power and the environmental temperature.
4. The industrial wireless remote controller with variable speed function control according to claim 2, characterized in that: The host also includes a state indication circuit connected to the host MCU, a control circuit for connecting buttons and control handles, and a host end radio frequency transceiver unit in wireless communication with the hand control box end radio frequency transceiver unit.