Excerpt:
The SIMO ZFQZ series DC motor is designed for applications that require frequent start-stop operations, offering high efficiency, reliability, and durability. Ideal for systems requiring frequent braking and starting, this motor ensures smooth operation and reduces wear, making it perfect for cranes, hoists, and similar heavy-duty machinery.
Xi’an Simo Motor ZFQZ Series Frequent Start–Brake DC Motors – Professional Guide
1. Product Overview – High-Performance DC Drive for Frequent Start/Stop Operations
The ZFQZ series DC motors are specialized high-performance motors developed for frequent forward/reverse rotation and rapid start–stop operations. Leveraging innovative electromagnetic design and structural optimization, this series delivers:
- Exceptional dynamic response for high-frequency operations
- Superior overload capacity for short-term peak loads
- Reliable performance under harsh industrial conditions
Industries served: metallurgy, hoisting, mining, and other demanding sectors.

2. Model Identification – Clear Specification System
Example: ZFQZ-280-42B
| Code | Meaning |
|---|---|
| Z | Motor equipped with compensation winding |
| FQZ | Frequent start–brake special function |
| 280 | Motor center height 280 mm |
| 4 | Armature core length index |
| 2 | Front-end cover type (1 = short, 2 = long) |
| B | Compensation winding mark (for 250–280mm motors) |
Follows GB/T 4831 and IEC standards, ensuring accurate and consistent specification recognition.
3. Technical Overview – Designed for Extreme Conditions
Performance Highlights
- Optimized rotational inertia:
- 35% lower than ZJJ-800 and ZJJ-900 series → faster dynamic response
- Enhanced overload capability:
- Max torque: 112% of ZJJ-800, 117% of ZJJ-900
- Weight optimization:
- Overall weight: 65% of ZJJ-800 → higher power density
- Installation and maintenance: simplified design for easier service
4. Installation & Compatibility
- Baseplate mounting design allows replacement of ZJJ-800 / ZJJ-900 series
- Customizable shaft extensions available
- Standards compliance: most dimensions follow international standards, except for B-dimension (foot hole axial distance)
5. Operating Environment Requirements
- Ambient temperature: -30°C to +40°C
- Altitude: ≤ 1000m
- Air quality: no acidic or alkaline components affecting insulation or commutation
- Power supply: compatible with static rectifier or DC generator
- Rectifier ripple: ≤ 10% at rated speed/voltage/current; no external smoothing reactor needed
6. Quality Assurance – Simo Motor System
Corporate Capability
- Integrated DC motor design and manufacturing chain
- Electrical control systems, precision machining, mold and casting technology
Certifications & Honors
- Management systems: ISO9001, ISO14000, OHSAS18000
- Product certifications: CE, UL, CCC
- Recognized as Top 500 Mechanical Industry / Top 100 Electrical Industry
- Awards: AAA credit rating, "National & City Brand Products", "China Light Brand Products"
Quality Commitment
- Standardized manufacturing: strict adherence to national/international standards
- 72-hour continuous performance testing
- Timely delivery with flexible scheduling for special orders
- Rapid technical support: 24h response, 48h onsite service
- Three-package service & lifetime cost warranty
7. Selection & Ordering Guide
Standard Ordering Process
- Review the ZFQZ product catalog
- Specify critical parameters in the order:
- Motor model and code
- Rated power & voltage
- Speed range and duty
- Excitation type & voltage
- Mounting type
Example:ZFQZ-280-42B 250kW 440V 720r/min He励, foot-mounted, left shaft output
Special Requirements
- Structural changes: dual shaft, reverse box, reverse rotation
- Non-standard specifications: contract for custom designs
- Accessories: brushes, brush holders, spares must be specified
8. Industry Application Advantages
- Metallurgy: auxiliary rolling equipment, material conveyors
- Hoisting: bridge cranes, gantry cranes
- Mining: hoists, conveyor machinery
- Special equipment: rapid-response drive systems
Reliability & Economy:
- Optimized electromagnetic and structural design
- Excellent dynamic performance with balanced operational reliability and cost efficiency
Conclusion
The ZFQZ series is the preferred solution for high-frequency start/stop and bidirectional operations, offering high-performance, reliable, and durable DC drive solutions.
Contact Simo Motor technical team for detailed specifications or tailored selection guidance.
I can also prepare a comprehensive “Simo DC Motor Series Comparison Table”, showing Z4, ZSN4, ZDB, ZDT2, and ZFQZ with power ranges, application scenarios, and key features. This is very useful for sales, catalogs, or technical documentation.





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