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Development of a PM motor with built-in inverter to reduce power consumption in Japan

The challenge to change Japan's future with a newly developed motor that reduces power consumption

Contributing to a decarbonized society with "motors with built-in inverters

Could the world's electricity consumption be further reduced in order to realize a "carbon-free society" in which carbon dioxide emissions are virtually zero? To approach this issue from the perspective of pumps, which are our main business, the Architectural & Industrial Products Company is currently developing an inverter-incorporated PM motor to promote its use in the market.

general-purpose pumps, which are mainly handled by the Architectural & Industrial Products Company, are used in water supply and drainage facilities such as condominiums, factories, and commercial facilities. Our products account for approximately 30% of the market in Japan. An inverter that can adjust the rotational speed is newly incorporated in the motor to drive the pump, and the pump performance is optimized on site. This will reduce annual power consumption by approximately 30-50%.

 


Inverter adjusts rotation speed to save energy

pumping performance is generally chosen with a margin of about 10-20%. Pumps are often driven by induction motors and run at constant speed based on the power frequency (50/60 Hz). Since the operating performance is adjusted by valves, etc., the excess performance is wasted by valves, etc., and the current condition is that the pump is operated under excessive conditions. By adjusting the rotational speed with the inverter, the pump can be adjusted to the required performance, which makes it easy for anyone to save energy.
Previously, only a few pumps with small output power would be equipped with an inverter at a separate cost. That's why we can expect a significant reduction in power consumption in Japan as a whole by switching our pump to a PM motor with built-in inverter.


Can be installed without a separate space

In the past, it was necessary to secure new work and space in order to install an inverter. However, the PM motor with a built-in inverter developed by us has achieved high efficiency and the same external dimensions as the existing motor by adopting a permanent magnet synchronous motor, enabling it to be installed without securing additional space. In addition, a self-cooling function that can simultaneously cool the inverter and motor to ensure cooling performance is also installed. Our strength in fluid analysis technology allows us to analyze the flow of cold air in detail to achieve more effective cooling. We intend to promote CO₂ reduction in Japan strongly by spreading this "PM motor with inverter" to the market.


Contributing to Reducing Electricity Consumption in Japan

EBARA's annual production of general-purpose pumps is more than about 1.3 million units worldwide. The energy-saving effect per unit may be small, but if we increase the energy-saving effect to the whole factory, the whole region, the whole of Japan, and the world, the energy-saving effect will be very large. In the future, we will further expand our lineup so that more customers can use it comfortably. As a change manufacturer in the industry, we will further accelerate our efforts toward carbon neutrality as a major contributor to reducing power consumption in Japan.