In the previous article, we discussed the common uses of liquid aluminum electrolytic capacitors in low-frequency and conventional applications. This article will focus on the advantages of solid-liquid hybrid capacitors in high-frequency and high-power electric motorcycle applications, exploring their important role in enhancing performance and efficiency.

High-Performance and Ultra-Stable Electric Motorcycle Motor Controller: A Selection Plan for Liquid Aluminum Electrolytic Capacitors

The important role of capacitors in motor controllers

In high-speed electric motorcycles, the motor controller is the core component that integrates the motor’s drive and control functions into a single device. It is primarily responsible for efficiently converting the electrical energy provided by the battery into the motor’s driving power, while optimizing the motor’s operation through precise control algorithms. At the same time, the capacitors on the drive board play a crucial role in energy storage, filtering, and releasing instantaneous energy within the motor controller. They support the high instantaneous power demands during motor startup and acceleration, ensuring smooth power output and enhancing the overall efficiency and stability of the system.

Advantages of YMIN polymer hybrid aluminum electrolytic capacitors in motor controllers

• Strong Seismic Performance: High-speed electric motorcycles often encounter bumps, impacts, and intense vibrations during operation, especially at high speeds and on rough terrain. The strong seismic performance of the polymer hybrid aluminum electrolytic capacitors ensures that they remain securely attached to the circuit board in these environments. This prevents the capacitor connections from loosening or failing, reducing the risk of capacitor failures due to vibration, lowering maintenance requirements, and improving the overall reliability and lifespan of the vehicle.
• Resistance to High Ripple Currents: During acceleration and deceleration, the motor’s current demands change rapidly, leading to significant ripple currents in the motor controller. Polymer hybrid aluminum electrolytic capacitors can quickly release stored energy, ensuring a stable current supply to the motor during transient changes and preventing voltage drops or fluctuations.
• Strong Resistance to Ultra-High Surge Currents: A 35kW high-speed electric motorcycle motor controller, paired with a 72V battery module, generates large currents of up to 500A during operation. This high-power output challenges the system’s stability and responsiveness. During acceleration, climbing, or rapid starts, the motor requires a substantial amount of current to provide sufficient power. Polymer hybrid aluminum electrolytic capacitors have strong resistance to large surge currents and can rapidly release stored energy when the motor requires instantaneous power. By providing stable transient current, they reduce the stress on the motor controller and other electronic components, thus lowering the risk of failure and enhancing the overall system’s reliability.

Recommended Selection

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The integrated drive and control motor controller provides a highly efficient and stable driving solution for high-speed electric motorcycles, simplifying the system structure and enhancing performance and response speed. It is particularly suitable for scenarios that demand high power output and precise control. The strong seismic performance, resistance to high ripple currents, and ability to withstand ultra-high surge currents of YMIN polymer hybrid aluminum electrolytic capacitors ensure stable power output even under extreme conditions such as acceleration and high load. This guarantees the reliability and safety of the electric motorcycle.

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