ZSN4 Series DC Motor

Xi’an Taifu Simo ZSN4 Series DC Motor Model Description

Using the Xi’an Taifu Simo ZSN4-280-11B DC motor as an example: “Z” represents a DC motor; “SN” indicates a cement rotary kiln; “N4” signifies the fourth series design; “280” refers to the motor’s center height (mm); “1” represents the armature core length code; “1” denotes the end cover code; and “B” indicates the presence of a compensating winding.

Note:

• For frame sizes 315 and 355, the compensating winding is included, and the “B” designation can be omitted.
• The numbers 1 and 2 indicate short and long end covers, respectively.
• The codes for core length, from long to short, are 3, 2, 1, 09, 08, and 07.

Overview of Xi’an Taifu Simo ZSN4 Series DC Motor

The Xi’an Simo ZSN4 series DC motor is a specialized product developed based on the Z4 series DC motor, tailored to the operating conditions of cement rotary kiln loads.

This series employs an octagonal structure, which optimizes the use of stator space. The stator yoke is laminated, enabling the motor to withstand pulsating currents and high rates of current change. If a three-phase fully-controlled bridge rectifier power supply is used, there is no need for an external smoothing reactor. The motor uses an F-class insulation structure, providing it with a larger capacity. Designed to meet the specific requirements of cement rotary kilns, the motor can achieve a starting torque up to 2.5 times the rated torque. The cooling system uses duct ventilation, allowing the motor to operate safely and reliably in harsh, dust-laden environments.

Performance of Xi’an Taifu Simo ZSN4 Series DC Motor

Operating Conditions: 1.1 The motor should operate within an altitude not exceeding 1000 meters. 1.2 The temperature of the cooling medium entering the motor should not exceed 40°C. 1.3 The motor is designed for continuous duty (S1). 1.4 The armature circuit and excitation of the motor are powered by a static rectified power supply, though a DC generator set can also be used.1.5 For motors cooled by duct ventilation, the airflow and air pressure should meet the requirements specified in the table below, with the air inlet located on the non-commutator side end cover of the motor.

     The motor insulation is of F-class.

The motor’s rated armature voltage is 440V, but can be derived to 400V, 220V, or other voltages according to user requirements. For constant torque speed regulation under continuous armature current conditions, the motor’s minimum speed can reach 20 rpm, while still maintaining the rated torque and smooth operation.

The motor’s rated excitation voltage is 180V, though other excitation voltages can also be derived. To ensure reliable insulation of the excitation system, a discharge resistor must be connected in parallel with the excitation winding when the excitation circuit is disconnected to prevent self-induced electromotive force. When the excitation voltage is between 180V and 220V, the value is approximately 7 times the cold-state resistance of the excitation winding. If the excitation voltage is between 320V and 370V, the value is approximately 5 times.

The efficiency values in the technical data sheet are based on the motor operating at rated power, rated voltage, and rated speed, and include excitation losses but exclude the power required by the ventilation system.

The ZSN4-225 motor does not have a compensating winding but does include a series winding.

The motor is equipped with a grounding terminal.

The performance of this series of motors meets the national standard GB755-87 “Basic Technical Requirements for Rotating Electric Machines” and the departmental standard JB6316-92 “Technical Conditions for Z4 Series DC Motors”. The motors can also be tested according to the IEC34-1 standard set by the International Electrotechnical Commission.

Xi’an Simo Motor Quality Assurance

Xi’an Simo Motor (Group) Co., Ltd. is a large enterprise specializing in the production of medium and large-sized, high and low voltage, AC and DC motors. It is a systematic power system provider, integrating motor design and manufacturing, electrical control, mechanical processing, mold making, casting, and transportation into automated, complete projects. The company ranks among the top in the domestic motor industry in terms of production and sales, maintaining rapid growth for seven consecutive years. In 2004, it was listed among the top 500 in China’s machinery industry and ranked 58th in the 2005 China Electrical Industry rankings. The company was the first in the industry to obtain ISO9001-1994 quality system certification in 1995 and passed the ISO9001-2000 quality system certification by the China Quality Certification Center (CQC) in August 2005. In May 2006, it also passed the ISO14000 environmental management system and OHSAS18000 occupational health and safety management system certifications, as well as European “CE”, American “UL”, and national compulsory “CCC” certifications. The company has been rated as a AAA-grade enterprise for quality and credit. Its main products have been awarded titles such as “Ministry, Provincial, and Municipal Famous Brand Products” and “Xi’an Exempt from Inspection Products”, and have won honors such as “China’s Light of Brand Products.”

To enhance the quality of various electromechanical products and strengthen pre-sales and after-sales services, ensuring customer satisfaction, Simo Motor firmly implements the “Quality Assurance Statement” issued by eight units of the Machine Tool Industry Research and Design Institute of the Ministry of Machinery Industry. It conscientiously implements all the clauses in the statement and strictly adheres to the various regulations of the ISO9001:2000 quality management system, ensuring the following commitments:

1. Strictly adhere to relevant national standards and manufacture and inspect products in accordance with the technical requirements of the standards and contracts. Products that do not meet the standards will not leave the factory.
2. After the final assembly and online debugging of the products, the assembly personnel will conduct a 72-hour operation test before inspection. Strict type tests and reliability tests will be conducted according to relevant standards to improve the reliability of new products and eliminate early faults.
3. Under normal sales conditions, the above-mentioned products will be delivered on time. Functional components will be delivered within three months, with the possibility of early delivery in special circumstances. In case of delays, compensation will be provided according to the “97 New Measures for Quality Improvement.”
4. If quality problems are discovered during the use of the product, a response will be provided within 24 hours of receiving customer notification, and if on-site service is required, it will be initiated within 48 hours. Repair personnel will not leave until the fault is resolved.
5. Products will leave the factory with complete technical documentation. For any product quality issues, a three-package repair service (repair, replacement, and return) will be provided. If the product still fails to meet factory standards after repair, it will be replaced or refunded.
6. Simo Motor products come with a lifetime warranty at cost after purchase.

Ordering Information for Xi’an Taifu Simo ZSN4 Series DC Motor

If the required model specifications are not listed in this catalog, or if there are other special requirements, the contract and technical agreement should be signed after mutual agreement between both parties.

Before placing an order, please refer to the Simo Motor product catalog to determine the required model specifications and other data. In the order contract, specify the motor model, power, voltage, speed, excitation method, excitation voltage communication structure, installation form, and other data. Technical data can be found in Table 3, and outline and installation dimensions can be found in Figures 1-5.

If you have special requirements for Simo Motor products, such as double-shaft extension, reverse position of the junction box, or the addition of a tachometer, these should be clearly stated in the contract.