Motor Types and Technical Features
Motor Types and Technical Features
This series of products is upgraded based on REALLAND's original STB series products. As the continuous
improvement of industrial machines, the demand for power system is increasingly evolving towards greater torque, smaller volume, higher dynamic servo capability, and more energy-saving. Therefore, REALLAND has launched SC-Low Inertia Permanent Magnet Synchronous Motor and SD-Ultra-Low Inertia Permanent Magnet Synchronous Motor.
Large torque/volume ratio
Due to the use of a segmented core process and magnets with higher magnetic energy product, and by optimizing the electromagnetic design of the motor, the volume of the motor is smaller than that of the STB series motor under the same torque.
Large torque/inertia ratio
The SC series is designed with higher peak torque and lower moment of inertia for high dynamic response. On the basis of SC, the SD series further reduces inertia to meet more stringent servo characteristics, such as injection molding machinery or packaging machinery. The differences are as follows:
Inertia of original STB series−100 N.m motor=166 kg.m2
Inertia of new SC series−100 N.m motor=139 kg.m2
Inertia of new SD series−100 N.m motor=95 kg.m2
Available DIY parameter design
In addition to the standard specifications, users may design DIY parameters according to the actual duty. REALLAND's Technology Department may provide customized designs according to user parameters to help achieve better performance, reduce current and converter capacity, and further realize energy saving and cost reduction.
Design features
The motor possesses the advantages of good magnetic field sine, THD less than 0.5%, and small pulsating torque, which facilitates the realization of high-precision torque and position control. It also adopts an epoxy packaging structure with good heat conduction and strong structural rigidity.
Product Applications
Product Applications
All-electric Injection Molding Machine
Blower
Model Description
Model Description
Example: SC21E-100-20/35-4A
Description of DIY Customization
Description of DIY Customization
Users can configure the motor in DIY on the basis of existing specifications of REALLAND. DIY customization may help users find a solution that satisfied its actual application, which can reduce current and motor size, further achieve energy saving, cost reduction, miniaturization, and converter capacity reduction under the existing electromagnetic structure framework, while the compliance of motor temperature rise and technical calibration is guaranteed.
DIY customization method (SC18 as an example)： Table 1: SC18 parameters
Table 2：SC18 torque coefficients
Step ③: Determine the torque characteristics at 1,000 r/min
Example: How to select the motor if the
required rated speed is 1,000 r/min?
Step ①: Determine the torque coefficient K in Table 2 according to the required speed
Step ②: Determine the reference torque TK1 (i.e., the torque at K=1). According to Table 2, the rotating speed is 2,000 r/min when K=1, and then refer to Table 1 to get TK1 data as follows
Step ④: Determine the motor frame No. according to the actual torque demand
For example, if the actual demand is 55 N.m,
SC18D must be selected when the motor is of long-term working system (S1-100%), but SC18C may be selected under the duty of S3-50% for the same demand of 55 N.m.
Step ⑤: Determine the parameters. If the user selects SC18C, the parameter table is as follows
Note 1: Duty current = Reference DUTY current * (selected rated speed/reference rated speed) = 21 * (1,000 / 2,000) = 10.5 A.
Note 2: Peak current = Reference peak current * (selected rated speed / reference rated speed) = 51 * (1,000 / 2,000) = 25.5 A.
Note 3: Maximum speed = 1.7 * rated speed = 1.7 * 1,000 = 1,700 r/min.
Note 4: Power = Speed * torque / 9,550 = 1,000 * 55.5 / 9,550 = 5.8 kW.
Step ⑥: Determine the order specification
Order specification: SC18C-55.5-10/17-4 A S3-50%
Description of specification: the frame No. of the motor is SC18C, the torque is 55.5 N.m, the rated
speed is 1,000 r/min, and the maximum speed is 1,700 r/min under the duty of S3-50%.
User Interface
User Interface
① User wiring
② Encoder
Resolver configured for
SC18/21/24 and SD21 (standard)
Multi-turn absolute encoder
configured for SC13 (standard)
③ Fan
Product Technical Parameters
Product Technical Parameters
Technical specifications of each series
SC13 parameter table
SC13 characteristic curve
SC13 motor outline drawing
Product Technical Parameters
Product Technical Parameters
SC18 technical parameters
SC18 characteristic curve
See the Description of DIY Customization on the next page for the DIY parameter customization method.
SC18 motor outline drawing
-Plain axis (standard), single keyway (optional)
Product Technical Parameters
Product Technical Parameters
SC21 technical parameters
SC21 characteristic curve
See the Description of DIY Customization on the next page for the DIY parameter customization method.
Product Technical Parameters
Product Technical Parameters
SD21 technical parameters
Radial force range of the bearing:- SC21A Radial load FR≤1500N，- SC21B/C/D Radial load FR≤3500N
SD21 characteristic curve
See the Description of DIY Customization on the next page for the DIY parameter customization method.
SC21/SD21 motor outline drawing
-B5 motor base (standard), foot can be customized
-Plain axis (standard), single keyway (optional)
Product Technical Parameters
Product Technical Parameters
SC24 technical parameters
SC24 characteristic curve
See the Description of DIY Customization on the next page for the DIY parameter customization method.
SC24 motor outline drawing
-B5 motor base (standard), foot can be customized
-Plain axis (standard), single keyway (optional)