The ordinary motors, stepper motors, and reducers menti […]
The ordinary motors, stepper motors, and reducers mentioned here refer to DC micromotors, and most of the contacts we usually make are DC motors. The correct installation, use and maintenance of the planetary gear reducer is an important link to ensure the normal operation of mechanical equipment. Therefore, when you install the planetary reducer, please strictly follow the installation and use related matters below, and carefully assemble and use it. Although the knowledge of motors is very deep, this article only gives a general description of the various motors that are often used for robots for beginners.
Electric motor, alias "motor", refers to such electromagnetic induction equipment that maintains the conversion or transmission of electromagnetic energy according to the law of electromagnetic induction. The motor is also called (alias motor), which is expressed by the English letter "M" (the old standard uses "D") in the power circuit. Its main function is to generate driving torque and be used as a power source for electrical appliances or various machines. The generator is indicated by the letter "G" in the circuit.
Ordinary DC motor
Ordinary motors are motors that we usually have more, and there are electric toys, razors and so on. Generally, there are only two wires, so the positive and negative wires connected to the battery will rotate, and the motor connected to the positive and negative wires of the battery will also reverse. The characteristic of this motor is that the speed is too fast and the torque is too small, and it is generally not used in smart cars.
The so-called cycloid reducer means that by adding a gearbox to the ordinary motor, the speed is reduced and the torque is increased, so that the ordinary motor has a wide use space. Gear reducer spur gear reducer is used for low current consumption, low noise and high efficiency and low cost applications.
Chassis of smart car
The cycloidal reducer is generally mounted on an intelligent vehicle, and the motor is generally controlled by the H-bridge method, and the L298 chip is its principle. On the other hand, the speed regulation generally adopts PWM (Pulse Width Modulation) mechanism. The single-chip microcomputer generates PWM wave with variable duty cycle through timer control, or directly generates hardware PWM to output waveforms of different sizes to control the overall speed of the car.
The stepper motor is an open-loop control unit stepper motor element that converts electrical pulse signals into angular and linear displacements. Gear reducer spur gear reducer is used for low current consumption, low noise and high efficiency and low cost applications. In the case of no overload, the motor's speed and stop position only depend on the frequency and number of pulse signals. When the stepper driver receives the pulse signal, driving the stepper motor to rotate at a certain angle in the set direction is called " "Step angle", its rotation is further operated at a certain angle. By controlling the number of pulses, the angular displacement can be controlled to achieve correct positioning. At the same time, by controlling the pulse frequency, the rotation speed and acceleration of the motor can be controlled to achieve the purpose of speed regulation.
Steering gear and reducer
The steering gear is mainly composed of housing, circuit board, coreless motor, gear and position detector. Send a signal from the receiver to the servo, determine the direction of rotation through the IC on the circuit board, rotate the coreless motor, transmit power to the swing arm through the reduction gear, and return the signal from the position detector to determine whether positioning has been reached. The position detector is actually a variable resistor, and the resistance value also changes when the servo rotates, and the rotation angle can be known by detecting the resistance value. The steering gear specifications and materials presented by the manufacturer include basic information such as dimensions (mm), torque (kg/cm), speed (seconds/60°), detection operating voltage (V) and net weight (g). The unit of torque is kg/cm, which means that the swing arm can hold a few kilograms at a length of 1 cm. This is the concept of a force arm, so the longer the swing arm length, the smaller the torque. The speed unit is seconds/60, which means the time required for the steering gear to rotate 60°.
The reducer is also called a drive motor. It functions as a driver in an automatic control system and converts the received electrical signal into angular displacement and angular velocity output on the motor shaft. It is divided into two categories of DC and AC reducers. Its main feature is that there is no rotation phenomenon when the signal voltage is zero, and the speed decreases with the increase of torque.
It can be understood that the servo is mainly positioned by pulses. Basically, when the servo motor receives one pulse, it only rotates by an angle corresponding to one pulse for displacement. Because the servo motor itself has the function of sending pulses, the corresponding number of pulses is sent out every time the servo motor rotates an angle, which can correspond to the pulses received by the servo motor, or called closed loop, the system can know how many pulses are sent to the servo motor , Receive several pulses at the same time to return, correctly control (control) the rotation of the motor, and achieve the correct positioning, which can reach 0.001mm.
DC reducers are divided into brushed and brushless DC motors. The brushless motor has low cost, simple structure, large starting torque, wide speed range, easy to operate, and must be maintained. However, the maintenance is not convenient (change the motor carbon brush), which causes interference signals and has provisions for the natural environment. Therefore, it can be used in general industrial production and civilian-type places that are sensitive to cost.
The manufacturer of precision planetary gear cycloid reducer (divided into gear reducer, worm reducer, etc.) is a German brand. Craftsmanship, a German brand, has been focusing on the field of precision planetary cycloid reducers, is a solution provider in the field of precision planetary transmission, and is one of the few planets in China that integrates R&D, manufacturing, assembly, sales (Sales) and service. Cycloid reducer manufacturers.
Professional production of reducer cycloid reducer, stepper motor cycloid reducer, etc. Products are divided into high precision helical planet cycloid reducer and standard straight tooth planet cycloid reducer series. The stepper motor of the reducer is fully equipped.