Question

Why do supercapacitors need servo motors to use? Do supercapacitors need stepper motor control?

Answer 1

Supercapacitors themselves do not directly require servo motors to be used. Supercapacitors and servo motors are two different electrical devices, each with different functions and uses.

Overview of Supercapacitors

Supercapacitors, also known as farad capacitors or double-layer capacitors, are special capacitors between traditional capacitors and rechargeable batteries.

It combines the large current fast charging and discharging characteristics of ordinary capacitors with the energy storage characteristics of batteries, and can fill the gap in energy and specific power between ordinary capacitors and batteries. 

Supercapacitors store energy through the interfacial double layer formed between electrodes and electrolytes, and have the advantages of high capacity, high power density, fast charging and discharging, long life and environmental protection.

These characteristics make supercapacitors widely used in many fields, such as automobiles, electricity, industry, communications, consumer electronics, etc.

Overview of Servo Motors

Servo motors are closed-loop controlled motors that can accurately control the position, speed and acceleration of the motor's rotor (or permanent magnet). It is usually used with a servo drive to achieve precise control of the motor's movement by receiving command signals from the controller.

Servo motors are widely used in applications that require high-precision position control and speed control, such as industrial automation, robotics, CNC machine tools, and other fields.

Relationship between supercapacitors and servo motors

Supercapacitors and servo motors are relatively independent in function and application. Supercapacitors are mainly used for energy storage and release, while servo motors are used to achieve precise position and speed control.

In some application scenarios, supercapacitors and servo motors may appear at the same time, but this does not mean that supercapacitors require servo motors to be used.

For example, in hybrid vehicles, supercapacitors can be used as energy storage systems to provide energy to the motor together with batteries. The motor here may be a servo motor or other type of motor, but the use of supercapacitors does not depend on the type of motor.

Similarly, in the field of industrial automation and robotics, servo motors may require a stable power supply, but they do not necessarily require supercapacitors to provide this supply. These systems may use other types of energy storage devices (such as batteries) or directly obtain power from the grid.

Conclusion

In summary, supercapacitors do not require servo motors to be used. They each have different functions and uses and play their own roles in different application scenarios.

In some cases, supercapacitors and servo motors may appear together, but this does not mean that there is a direct dependency between them.

Answer 2

Supercapacitors can also be used as a safe redundant power supply for key electronic and electrical equipment such as lidar, domain controllers, electronically controlled steering, electronically controlled brakes, intelligent cockpits, and electric door locks, reducing traffic accidents caused by electronic device failure and reducing the risk of potential recalls. 

ISO 26262, published in 2011, emphasizes testing and verification in the development phase to ensure that the functional failure of safety-related electronic products does not pose a danger, and in the future, with the improvement of autonomous driving level and the upgrading of automotive electrification, supercapacitors are expected to penetrate in the field of automotive safety redundant power supplies.

Answer 3

Servo motors and stepper motors have a great effect on supercapacitors.

48V by-wire power supply: the by-wire chassis accelerates the penetration, and the supercapacitor adapts to its high-power requirements.
The escalating demand for autonomous driving requires that the automotive chassis execution layer can be accurately executed in accordance with the instructions of the decision-making layer, and chassis by-wire control is a control technology that replaces traditional mechanical connection with electrical signal transmission, which is the key technology for L2+ and above autonomous driving to achieve the response speed and accuracy of the execution layer. The by-wire chassis includes five core systems: steer-by-wire, brake-by-wire, shift-by-wire, throttle and suspension-by-wire, among which the throttle technology has been mature, and the penetration rate of brake-by-wire, steer-by-wire and by-wire suspension has begun to increase rapidly. The actuator of the by-wire system is mainly a high-power motor, servo motor, for example, the power range of a single steering motor is 550~800W, and the power of the motor disc brake can reach 1000W, so it is necessary to apply a 48V power supply system to meet the high-power demand by increasing the power supply voltage.

Supercapacitors can be used as 48V by-wire power supplies to ensure safe and reliable operation of by-wire systems with high power density, long life, wide temperature range, and fast response time.

Answer 4

Supercapacitor discharge device, the device includes a main control unit, a current detection unit, an inverter unit and a motor unit, and the main control unit is connected with a current detection unit, an inverter unit and a motor unit to control supercapacitor discharge; The current sensing unit is connected to the inverter unit and the motor unit to detect the supercapacitor discharge current; The input of the inverter unit is connected to the supercapacitor module, and the output terminals U, V, and W are respectively connected to the input terminals of the three-phase stator winding of the motor unit, which are used to control the on-off of the discharge circuit of the supercapacitor and the selection of the discharge circuit; The energy of the supercapacitor is discharged through the inverter unit and the motor unit.