REXRTOH MSK series synchronous servo motor

REXRTOH MSK series synchronous servo motor

Introduction: Overview and Technical Characteristics of MSK Series Servo Motors

Bosch Rexroth's MSK series synchronous servo motors, as the core execution components of high-performance industrial motion control systems, are widely used in various automation machinery and precision equipment due to their excellent reliability, accuracy, and power density. This article is based on the official document (DOK-MOTOR-MSK-ITO3-ZH-P, version 03/2021), aiming to provide a complete and standardized operation and maintenance framework for equipment manufacturers, system integrators, and on-site maintenance personnel.

MSK motor is a permanent magnet excitation three-phase synchronous motor, specially designed to be optimized for use with Rexroth frequency converters (such as the IndraDrive series). Its core features include:

Model range: covering various machine base specifications such as MSK030, 040, 043, 050, 060, 061, 070, 071, 075, 076, 100, 101, 103, 131, 133, etc.

Certification and Standards: Complies with UL 1004 (5th edition), CSA C22.2 No. 100-04 standards, and meets the requirements of the Low Voltage Directive 2014/35/EU, EN 60034-1 (rated value), EN 60034-5 (protection level), etc.

Key design: The standard protection level is IP65 (after correctly installing the connector), and optional IP67 (requires sealing with air). The motor design complies with the B5 (flange installation) or B35 (flange with foot) type of EN 60034-7. The insulation level is 155 and the vibration intensity is A.

Encoder options: S1 (Hiperface single turn), S2 (EnDat 2.1 single turn), S3 (capacitive Hiperface single turn), and corresponding M1, M2, M3 multi turn absolute value models are available.

Optional accessories: including motor holding brake (24VDC ± 10% release), fan cooling unit (F), liquid cooling unit (N), and junction box connection method.

Core safety standards: homework prerequisites and life support

Before operating any driver component, it is necessary to thoroughly understand and strictly comply with safety regulations. The safety warning of MSK motor runs through its entire lifecycle, and the main risks are concentrated in the following aspects:

Electrical hazards:

High voltage electric shock: The driver components must operate under the premise of permanent and reliable grounding. Before carrying out any homework, the power must be cut off and the capacitor must be fully discharged (at least 1 minute).

Job Qualification: Only qualified personnel who are familiar with the electrical drive system and have received training are allowed to perform installation, wiring, and maintenance tasks. Before starting the homework, it is necessary to follow the "lockout tagout" procedure: turn off the main switch, prevent accidental connection, verify no voltage, ground and short-circuit, and isolate adjacent live parts.

Mechanical and motion hazards:

Dangerous movement area: It is strictly prohibited for personnel to stay within the working range of the moving parts of the machine. Physical barriers or electronic protection must be installed to prevent accidental entry.

Unexpected shaft movement: Before coming into contact with the hazardous area, the control system must ensure that the drive shaft comes to a complete and safe stop. For the vertical axis, relying solely on the motor brake is not sufficient to ensure personnel safety, and additional mechanical locking, external braking, or counterweight devices need to be used.

Rotating components: Transmission keys and couplings must be fixed to prevent flying out during high-speed rotation. Before starting, protective covers should be installed on all dangerous rotating parts.

Magnetic and electromagnetic field hazards:

Health hazards: The strong magnetic/electromagnetic fields generated by motor operation pose serious health risks to individuals wearing pacemakers, metal implants, or hearing aids. Such personnel are prohibited from approaching or touching the motor in operation or installation.

Item damage: Strong magnetic fields can damage watches, credit cards, magnetic stripe cards, and all ferromagnetic metal items. When operating, stay away from the motor.

Hot surfaces and burn hazards:

The surface temperature of the motor during operation may exceed 60 ° C or even 70 ° C. Before touching, ensure that the motor has cooled for at least 15 minutes. At the same time, it is necessary to ensure that insulation sensitive components (such as cables) are kept at a safe distance from the surface of the motor.

Physical hazards during transportation and installation:

Suitable lifting and transportation equipment must be used, and the correct tools and personal protective equipment (such as safety gloves) must be used.

Installation and mechanical integration: the cornerstone of accuracy and reliability

Correct mechanical installation is the foundation for ensuring motor performance, lifespan, and operational accuracy.

Flange installation (B5/B35):

Use all mounting holes to ensure that the motor is securely fixed to the machine base.

Ensure that the mating surface is flat, clean, and aligned with the center. Avoid damaging the centering protrusion on the motor side or the mating surface on the equipment side.