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The new motor will introduce a "instantaneous low" safety device using capacitors
In October 2006, Nisshin Motor is set to introduce an innovative instantaneous voltage reduction countermeasure device, also known as an instantaneous low-voltage safety system, which utilizes a high-performance electric double-layer capacitor developed in-house. This new device is designed to address voltage drops caused by lightning strikes or other electrical disturbances, ensuring uninterrupted operation of critical production lines. Previously, the company had used aluminum electrolytic capacitors and lead-acid batteries for similar applications.
According to Nisshin Electric, the adoption of electric double-layer capacitors brings significant advantages over previous technologies, enabling the development of more advanced and efficient solutions. Specifically, when compared to traditional aluminum electrolytic capacitors, the electric double-layer capacitor can extend the compensation time from just 0.35 seconds to anywhere between 1 and 10 seconds. This extended duration offers enhanced protection for vital systems, such as those found in semiconductor manufacturing facilities.
Moreover, when the compensation time exceeds one second, the electric double-layer capacitor allows for a more compact design than its aluminum-based counterpart. This makes it ideal for space-constrained environments.
In contrast to lead-acid batteries, which require replacement every few years, the new system has a significantly longer lifespan—up to 15 years—reducing long-term maintenance costs. Additionally, because electric double-layer capacitors do not contain lead, they are more environmentally friendly and safer to handle.
Looking ahead, the technology is expected to find applications in both the automotive and wind power generation industries. Nisshin plans to launch a low-voltage safety device equipped with a 200kVA electric double-layer capacitor, targeting switchboards in semiconductor equipment and production lines. The initial production volume is estimated to be around 10,000 to 20,000 units in the first year.
The company aims to further reduce costs through overseas manufacturing, making the product suitable for use as an auxiliary power supply in vehicles and as an output balancing device in wind turbines.
Although specific details about the independently developed electric double-layer capacitor have not been disclosed, it is reported to have an energy density approximately 100 times higher than that of conventional aluminum electrolytic capacitors. The unit measures roughly 10 cm x 13 cm x 3 cm, operates at a rated voltage of 2V to 3V, and has a capacitance of 1,500 farads. Nisshin Electric is currently setting up a mass production line for these units, signaling a major step forward in energy storage technology.