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PMDC Motor Range
PMDC Motors or permanent magnet direct current motors are a form of brushed DC electric motors. These motors employ a commutator-brush system for continuous rotation, with speed controlled by adjusting the supply voltage—typically from 6 V up to 220 V—to yield a linear speed-torque relationship.
Pmdc Motor solutions from PJM's PMDC (Permanent Magnet Direct Current) Motors offer robust construction, high starting torque, and simple speed control, making them ideal for applications ranging from automotive to medical devices. Available in diameters from 6 mm to 220 mm, these Pmdc Motor models can be customized for voltage, torque, speed, and environmental requirements to suit diverse project needs. As a trusted Pmdc Motor Manufacturer, PJM's Pmdc Gear Motor variants integrate precision gearboxes to deliver enhanced torque and compact form factors. With competitive Pmdc Motor Price options and full OEM/ODM support, PJM ensures cost-effective, reliable PMDC Motor solutions backed by ISO 9001 and RoHS compliance.
Stator: Contains permanent magnets to create a stationary magnetic field.
Rotor (Armature): Wound with coils and connected to the DC power supply via a commutator and brushes.
When current flows through the armature windings, it creates a magnetic field that interacts with the stator's magnetic field, producing torque and rotation.
Key features: the stator uses permanent magnets, the commutation uses brushes and a commutator to keep continuous rotation, speed controlled by varying the supply voltage.
Advantages: simple construction, high starting torque, generally reliable and easy to maintain.
| Model | Diameter (mm) | Voltage Range (VDC) | Speed (RPM) | Torque (mNm) | Power (W) | Shaft Diameter |
| PM77 DC Brush Motor | 77 | 12–48 | 1000–5000 | 50–500 | 20–200 | 6–12 mm |
| PM52 DC Brush Motor | 52 | 6–24 | 2000–8000 | 20–200 | 10–100 | 4–8 mm |
| PM44 DC Brush Motor | 44 | 6–12 | 3000–10,000 | 10–100 | 5–50 | 3–6 mm |
| Micro DC Coreless | 6–20 | 3–12 | 5000–20,000 | 1–50 | 0.5–10 | 1.5–3 mm |
| Micro DC Brush Motor | 10–30 | 3–24 | 2000–15,000 | 5–100 | 1–20 | 2–5 mm |
1. Small size, light weight, and high power density: Car space is limited, and weight is crucial to fuel efficiency and electric vehicle range. PMDC motors do not require additional excitation windings and related power supplies, and are more compact in structure. They can provide sufficient power output in a smaller size and lighter weight, which is very beneficial for internal integration in vehicles.
2. High efficiency: PMDC motors are generally more efficient than traditional excitation DC motors because there is no copper loss in the excitation winding. In energy-sensitive applications such as automobiles, high efficiency means lower energy loss and better battery life (for electric vehicles).
3. Cost-effectiveness (especially for low-power applications): For various auxiliary functions commonly found in automobiles, such as window lifts, wipers, seat adjustments, door locks, fans, etc., the power required is usually not large. In such low-power applications, the manufacturing cost of PMDC motors is relatively low, which has economic advantages.
4. High starting torque: Many automotive auxiliary functions require fast response and strong starting torque, such as window lifts or wipers need to overcome a certain resistance at the moment of starting. PMDC motors perform well in this regard and can provide good initial driving force.
5. Excellent speed regulation performance: The speed of PMDC brushed motors can be easily controlled by changing the supply voltage, and its speed-torque characteristics are usually linear, which makes precise control possible and is very suitable for applications that require different speeds or precise position control.
6. Simple structure, high reliability, and easy maintenance: Compared with other types of motors, PMDC motors have a relatively simple structure, which reduces failure points and improves reliability. Reliability is crucial in environments such as automobiles that require long-term stable operation.
7. Easy to control: PMDC motors can be powered directly by a DC power supply, and speed and direction control can be achieved through simple circuits, which simplifies the design of automotive electronic control systems.
(1) Permanent magnet dc motors are widely used in various auxiliary systems in automobiles:
Window lift motors: require small size, high torque and precise control.
Wiper motors: require reliable starting, speed change and stopping functions.
Electric seat adjustment motors: require precise position control and sufficient thrust.
Door lock and mirror adjustment motors: require small and reliable drive.
Cooling fan and blower motors: require efficient and adjustable airflow.
Auxiliary motors in electric power steering (EPS) systems: Although high-performance EPS systems may use brushless DC motors, some simple or early EPS systems also consider PMDC motors.
(2）Household appliances like vacuum cleaners, blenders, and electric toothbrushes.
(3）Toys and hobbyist projects such as remote-controlled cars, drones, and other micro motors drive toys.
(4）Medical devices like infusion pumps and surgical tools.
PJM offer compact size PMDC motors from 6mm to 220mm diameter. You could choose the standard brushed motor series on the shelf as the following. Others can be tailored-made.
Stator: The stator of a PMDC motor consists of permanent magnets mounted on its inner periphery. These magnets create a constant magnetic field. The cylindrical steel stator also acts as a return path for the magnetic flux.
Rotor (Armature): The rotor, or armature, contains windings and is connected to a commutator and brushes.
Current Flow: When DC current is supplied to the armature windings via the brushes and commutator, it creates its own magnetic field.
Interaction and Torque: The magnetic field generated by the armature interacts with the constant magnetic field from the permanent magnets in the stator. This interaction produces a torque, causing the armature to rotate. The commutator reverses the direction of the current in the armature windings as it rotates, ensuring continuous torque in one direction.
Define Electrical Requirements: Match motor voltage (6 V, 12 V, 24 V, 48 V or higher) to available power supply.
Determine Torque & Speed Needs: Calculate startup torque vs. continuous duty demands to select appropriate size and gearing.
Assess Environmental Conditions: Choose IP-rated enclosures or high-temperature variants for dusty, wet, or hot settings.
Plan for Control & Maintenance: Integrate PWM controllers and schedule brush inspections to ensure long-term performance.
Brushless DC motors (BLDC) or permanent magnet synchronous motors (PMSM) are gradually replacing brushed PMDC motors due to their higher efficiency, longer life and maintenance-free characteristics, but PMDC motors are still an indispensable and ideal choice in scenarios with a large number of auxiliary functions and cost-sensitive.
Pmdc Motor Price varies by diameter, voltage, and customization level, with bulk pricing for standard brushed PMDC models. PJM's OEM/ODM services include bespoke branding, packaging, and documentation to streamline integration into your product lineup.
25+ Years of Expertise: Trusted by clients in over 50 countries for reliable motion solutions.
Certified Quality: ISO 9001, CE, and RoHS compliance guarantee rigorous manufacturing and environmental standards.
End-to-End Support: From initial consultation and prototyping to mass production and after-sales service.
Competitive Pmdc Motor Price: Transparent, value-driven pricing paired with global logistics options (DDP, FOB, EXW).
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