Infusion Pump Brushless Motor Applications

Portable medical infusion pumps are core devices for precise clinical drug delivery. Their power systems must meet three requirements: high precision, low interference, and long-term stability. Huajuntong HBL3630 inner rotor brushless motor (outer diameter 36mm, body length 30mm) has become the preferred power component for such equipment thanks to its precisely matched performance. The following analysis covers its adaptation logic, core parameters, and application value.

1. Core Adaptation Logic: Ensuring Medication Safety with Control Accuracy. The infusion delivery error of the infusion pump must be ≤±2%. The HBL3630 adopts a 3-phase 9-slot 12-pole structure with a built-in Hall sensor and drive board to form closed-loop control, keeping the speed fluctuation rate ≤0.5% (far better than ≥5% for brushed motors). It provides constant power for the peristaltic pump, avoiding safety risks caused by speed fluctuations in special liquids such as chemotherapy drugs.

2. Key Performance Parameters: Precisely Matched to Infusion Pump Requirements. The core motor parameters are specifically adapted: Speed: 1500-3000rpm rated range supports 50-100kHz PWM speed control. After 10:1 reduction, it matches the peristaltic pump’s 150-300rpm operating demand, satisfying 0.1-10mL/h flow adjustment. Torque: rated ≥0.08N·m, stall torque ≥0.8N·m, capable of handling viscous liquid resistance of 1-50mPa·s. Power consumption: 6-24VDC wide voltage input, operating current ≤0.8A at 12V (power ≤10W), ensuring more than 8 hours of battery life.

At the same time, the motor meets medical standards: EMC indicators (radiated disturbance ≤30dBμV/m, conducted disturbance ≤40dBμV) avoid interference with equipment circuits; operating temperature range -10℃~60℃ and IP54 protection adapt to various scenarios; built-in overcurrent (1.5A), overvoltage (28V) and stall protection (triggered in 0.3 seconds) provide safety redundancy.

3. Application Value: Balancing Performance and Practicality. The brushless structure ensures the motor operates at noise ≤38dB (below the 45dB ward requirement), with MTBF up to 20,000 hours (6 times higher than brushed motors). This ensures a quiet diagnosis and treatment environment while reducing equipment maintenance costs. As the core power source, it drives the peristaltic pump roller to squeeze the infusion tube via the gear set. Combined with the 10ms fast speed regulation response of the Hall sensor, it ensures the medication accuracy remains within ±2%, providing reliable support for clinical medication.

With core advantages of "high-precision control, adaptable parameters and medical-grade reliability", the HBL3630 has become an ideal power solution for portable infusion pumps. It not only guarantees medication safety, but also supports equipment miniaturization and portability, with significant clinical value.