MMP757188-36-C Monolithic Power Systems

MMP757188-36 Motor Control Board for Servo Motor Applications Requiring Speed/Position Control FEATURES DESCRIPTION The MMP757188-36 is part of a family of smart 18V to 70V Input Voltage Range motor control boards for servo motor applications. Max 188W Continuous Power Output This design is capable of delivering 188W peak 0.6N-m Rated Torque (1.8N-m Peak Torque) power, and is designed to fit NEMA 23 format, 0.3 Position Resolution 57mm motors. RS485 Interface and PULSE/DIR Interface Position Control and Speed Control The board features: an embedded angular sensor Operating Temperature: 0C to 70C (Power FOC control selectable position, speed, and torque Derated > 40C) loop modes and RS485 and PULSE/DIR input interfaces. Storage Temperature: -40C to +125C Easy-to-use GUI software provides flexibility by allowing users to optimize the design online ORDERING INFORMATION through the RS485 control interface. The parameters are saved in the control board s non- Part Number MMP757188-36-C volatile memory. Diameter (mm) 57 Users can also order a complete motor Power (W) 188 (MSM957188-36). A datasheet for the Typical Voltage (V) 36 MSM957188-36 is available for download at Control Mode Speed/Position www.monolithicpower.com. Interface RS485, PULSE/DIR RECOMMENDED OPERATING CONDITIONS Input voltage ................................ 18V to 70V Control interface voltage ............... 0V to 5.5V Max pulse frequency .......................... 500kHz RS485 A/B voltage ....................... 0V to 5.5V RS485 common mode voltage ............. 15V Operation temperature ................ 0C to 40C Storage temperature ........... -40C to +125C Figure 1: Motor Control PCBA Motor Control Board Parameters Condition Value Units Input voltage 36 V 0C to Output power 188 W 40C Position resolution 0.3 Nominal speed 3000 rpm Nominal torque 0.6 N-m 2 Rotor inertia 430 g-cm Diameter 57 mm Shaft diameter 8 mm Length Body only 116 mm Weight 1502 g MP757188-36 r0.8 www.MonolithicPower.com 1 6/14/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2019 MPS. All Rights Reserved. MMP757188-36 MOTOR CONTROL PCB INSTALLATION OF PCB ASSEMBLY IN SMART MOTOR Figure 2: Smart Motor PCB Assembly The motor control PCB assembly can be installed into a motor (see Figure 2). Users can manufacture their own control board housing and magnet holder based on the actual motor dimension. MPS will supply the magnet. Table 1 shows some examples of recommended magnets for use with the MMP module. A sintered NdFeB or SmCo magnet of a 6mm to 8mm diameter and 2.5mm to 3mm height with remanent field strength in the 1.0T to 1.2T range is suggested (see Figure 3). The diameter of the magnet depends on the specific motor shaft and holder design used. It is important that the magnetization be diametrically polarized. Figure 3: Magnet Height and Diameter The magnet air gap spacing to the sensor surface should be set to achieve a field strength between 30mT min and 80mT max (see Figure 4). The MPS magnetic simulation tool at