A brushless motor automatic speed regulation tooling device
By combining the NE555 timer and voltage divider resistor network with a single-pole double-throw relay for automatic speed control, the problems of cumbersome and inaccurate speed regulation methods of existing brushless motors are solved, achieving efficient and low-cost automated speed control, and improving production efficiency and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHUHAI CITY TONGDE ELECTRIC EQUIP CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional brushless motor speed regulation methods are cumbersome to operate, inefficient, and have poor accuracy. Furthermore, existing automation solutions are costly and complex.
The system employs an NE555 timer, a voltage divider resistor network, and a single-pole double-throw relay. The timer controls the switch module to achieve automatic switching between two speeds. The voltage divider resistor network provides a fixed voltage, and the motor speed control gear switching logic is based on the relay contact state for automatic switching.
It achieves automated speed control without the need for additional sensors, reducing system complexity and cost, improving speed control accuracy and production efficiency, extending equipment life, and reducing hardware costs and manual intervention.
Smart Images
Figure CN224418707U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automatic speed control technology for brushless motors, specifically to a tooling device for automatic speed control of brushless motors. Background Technology
[0002] In the production and testing of brushless motors, traditional speed regulation methods have significant drawbacks: manually adjusting the voltage via a knob potentiometer or button to switch speeds is not only cumbersome and inefficient, but also prone to wear on the potentiometer's sliding contacts, resulting in poor speed regulation accuracy (errors can reach ±5%). Furthermore, the shifting time relies on manual control, lacks fixed logic, and is difficult to meet standardized testing requirements.
[0003] However, in actual use, it was found that although there are automatic speed control solutions in the existing technology, they mostly rely on complex sensors or external power supplies, which are costly and increase system complexity. Utility Model Content
[0004] The purpose of this invention is to provide an automatic speed control fixture for brushless motors to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an automatic speed control fixture for a brushless motor, comprising a timer control switch module, a two-way speed control voltage setting module, and a motor speed control gear switching logic. The timer control switch module includes an NE555 timer, a transistor drive circuit, and a single-pole double-throw relay. The two-way speed control voltage setting module divides the input voltage into two fixed voltages through a voltage divider resistor network. The motor speed control gear switching logic automatically switches the speed control voltage based on the relay contact state.
[0006] According to the above technical solution, the delay time of the NE555 timer is adjusted by an external potentiometer, ranging from 0.1s to 1000s.
[0007] According to the above technical solution, the output voltage error of the voltage divider resistor network does not exceed ±1%.
[0008] According to the above technical solution, the reset button is a double-pole single-throw button, which is connected to the timer reset pin and the timer capacitor pin.
[0009] According to the above technical solution, the normally closed contact of the single-pole double-throw relay is connected to the low voltage range, the normally open contact is connected to the high voltage range, and the common contact is connected to the motor speed control port.
[0010] According to the above technical solution, the transistor driving circuit adopts an NPN transistor, and the base is connected in series with a current-limiting resistor to the timer output pin.
[0011] According to the above technical solution, the voltage divider resistor network includes at least two sets of series resistors, and the high voltage is directly output from the input power supply.
[0012] According to the above technical solution, the timer control switch module and the voltage divider resistor network are connected to the same ground to reduce signal interference.
[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:
[0014] 1. Non-invasive detection: Automatic switching between two levels is achieved through a timer switch module, eliminating the need for additional sensors and reducing system complexity.
[0015] 2. High reliability: The voltage output is fixed by using voltage divider resistors, avoiding wear and tear on the knob potentiometer and extending its lifespan by more than 50%.
[0016] 3. Low cost implementation: Compared with traditional Hall sensor solutions, the hardware cost is reduced by 40%, and no external power supply is required.
[0017] 4. Increased automation: N preset selectable voltages, combined with timer automatic switching, reduce manual intervention and increase production efficiency by 30%.
[0018] 5. Optimized data accuracy: The error of the voltage divider resistor is controlled within ±0.5%, and the speed adjustment accuracy reaches ±1%. Attached Figure Description
[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0020] Figure 1 This is a schematic diagram of the circuit principle structure of the tooling equipment of this utility model;
[0021] Figure 2 This is a schematic diagram of the NE555 timer circuit principle structure of this utility model;
[0022] Figure 3 This is a schematic diagram of the voltage divider resistor network circuit structure of this utility model;
[0023] Figure 4 This is a schematic diagram of the relay switching logic timing structure of this utility model.
[0024] The diagram shows: 1. Timer control switch module; 2. Two-channel speed regulation voltage setting module; 3. Motor speed regulation gear switching logic; 4. NE555 timer; 5. Transistor driver circuit; 6. Single-pole double-throw relay; 7. Timer reset pin; 8. Timer capacitor pin; 9. Reset button; 10. Voltage divider resistor network. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Please see Figure 1-4 This utility model provides a technical solution: an automatic speed control fixture for a brushless motor, including a timer control switch module 1, a two-way speed control voltage setting module 2, and a motor speed control gear switching logic 3. The timer control switch module 1 includes an NE555 timer 4, a transistor drive circuit 5, and a single-pole double-throw relay 6. The two-way speed control voltage setting module 2 divides the input voltage into two fixed voltages through a voltage divider resistor network 10. The motor speed control gear switching logic 3 automatically switches the speed control voltage based on the relay contact state.
[0027] Please see Figure 1-2 The delay time of NE555 timer 4 is adjustable via an external potentiometer, ranging from 0.1s to 1000s.
[0028] Please see Figure 1 The output voltage error of the voltage divider resistor network 10 does not exceed ±1%.
[0029] Please see Figure 1-4 The reset button 9 is a double-pole single-throw button, connected to the timer reset pin 7 and the timer capacitor pin 8.
[0030] Please see Figure 1-4 The normally closed contact of the single-pole double-throw relay 6 is connected to the low voltage range, the normally open contact is connected to the high voltage range, and the common contact is connected to the motor speed control port.
[0031] Please see Figure 1-3 The transistor driver circuit 5 uses an NPN transistor, with a current-limiting resistor connected in series with the base to the timer output pin.
[0032] Please see Figure 1-4 The voltage divider resistor network 10 includes at least two sets of series resistors, and the high-voltage input is directly output.
[0033] Please see Figure 1-2 The timer control switch module 1 and the voltage divider resistor network 10 are connected to the same ground to reduce signal interference.
[0034] The implementation principle of the automatic speed control fixture for a brushless motor according to this application is as follows:
[0035] Example 1: Timer Circuit Parameter Settings
[0036] NE555 circuit configuration: The delay time of the monostable multivibrator is adjusted by potentiometer R1500kΩ, with a typical value of 1s-100s.
[0037] Voltage divider resistor network 10: R0 = 22kΩ, R2 = 1kΩ, R3 = 1kΩ, divides the input voltage, such as 24.0V, into two voltage levels: 1.0V and 2.0V.
[0038] Relay switching logic: After power-on, the relay is closed by default, outputting 1.0V; after a delay, it switches to open, outputting 2.0V.
[0039] Example 2: Industrial Application
[0040] Start-up phase: After power is connected, the NC contact of the relay is open, and the motor is supplied with 1.0V power, running for a set time, such as 5 seconds. After the timer is triggered, the relay switches to the NO contact, and the motor is supplied with 2.0V power.
[0041] Manual Reset: Press the reset button to control the timer reset pin via the button, forcibly switch to NC state, and restore low-speed operation.
[0042] Example 3: Test Data Verification
[0043] Rotational speed accuracy test:
[0044] When the output is 1.0V, the motor speed is 400rpm;
[0045] When the output is 2.0V in the second gear, the motor speed is 800rpm with an error of ±1%.
[0046] EMC test:
[0047] Electrostatic discharge protection rating IEC 61000-4-2: Level 3;
[0048] Electromagnetic compatibility complies with GB / T 17626.2-2018 standard.
[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0050] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A tooling device for automatic speed regulation of a brushless motor, comprising a timer control switch module (1) and a reset button (9), a two-channel speed regulation voltage setting module (2) and a motor speed regulation gear conversion logic (3), characterized in that: The timer control switch module (1) includes an NE555 timer (4), a transistor drive circuit (5), and a single-pole double-throw relay (6). The two-way speed regulation voltage setting module (2) divides the input voltage into two fixed voltages through a voltage divider resistor network (10). The motor speed regulation gear switching logic (3) automatically switches the speed regulation voltage based on the relay contact state.
2. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The delay time of the NE555 timer (4) is adjusted by an external potentiometer, ranging from 0.1s to 1000s.
3. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The output voltage error of the voltage divider resistor network (10) does not exceed ±1%.
4. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The reset button (9) is a double-pole single-throw button, which is connected to the timer reset pin (7) and the timer capacitor pin (8).
5. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The normally closed contact of the single-pole double-throw relay (6) is connected to the low voltage range, the normally open contact is connected to the high voltage range, and the common contact is connected to the motor speed control port.
6. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The transistor driving circuit (5) uses an NPN transistor, with a current-limiting resistor connected in series to the base of the timer output pin.
7. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The voltage divider resistor network (10) includes at least two sets of series resistors, and the high voltage is directly output from the input power supply.
8. The automatic speed control fixture for a brushless motor according to claim 1, characterized in that: The timer control switch module (1) is connected to the voltage divider resistor network (10) in a common ground to reduce signal interference.