Overview

A manufacturer needed a motor solution for a peristaltic pump used in water treatment applications. The pump treated drinking water with chlorine, so the motor needed to perform under varying water pressures and chemical exposure. Groschopp engineered a compact BLDC motor with a custom shaft design to support the application’s performance, durability, and fit requirements.

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Challenges

• Compact design: The motor needed to fit within a small package size while still delivering the required torque.
• Speed control: The application required a programmable motor that could adjust speed rapidly to help regulate flow. 
• Chemical exposure: The operating environment exposed components to chemicals, making shaft wear and corrosion a concern.
• Shaft fit: Extremely tight shaft tolerances were needed so the shaft could mate with the pump’s cam mechanism.
• Mechanical stress: The shaft also needed to withstand stress during operation.

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Groschopp’s Solution

Groschopp designed a compact BLDC motor for the peristaltic pump application. The motor provided high torque in a small package size and used a custom shaft designed for the operating environment and pump assembly.

Key features included:

• Programmable motor performance to support rapid speed adjustment and flow regulation
• Custom shaft with chrome plating to help prevent corrosion
• Heat-treated shaft designed to withstand operating stress
• Tight shaft tolerances to support fit with the pump’s cam mechanism
• Two years of extensive testing to evaluate reliability under the application conditions

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Results

The final design gave the customer a compact BLDC motor solution that could support the pump’s torque, speed control, and durability requirements. After two years of extensive testing, the motor proved reliable under the application’s operating conditions.