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A 100 RPM straight DC geared motor is a specific type of DC motor that is equipped with a gearbox to reduce its speed to 100 revolutions per minute (RPM). This type of motor is commonly used in applications where precise, slow-speed control and higher torque are required.

Key Features and Specifications:

1. Voltage:

   • Typically 12V DC: This is the most common voltage for such motors, though they can also be available in other voltages like 6V or 24V depending on the application requirements.

2. Speed:

   • 100 RPM: The output speed of the motor after the gear reduction. This is significantly slower than the motor's no-load speed, thanks to the gearbox.

3. Gearbox:

   • Gear Reduction: The motor includes a gearbox that reduces the speed of the motor's shaft while increasing the torque. The gear ratio of the gearbox determines the reduction from the motor's no-load speed to the final output speed of 100 RPM.
   • Type of Gears: Common types include spur gears, planetary gears, or worm gears, each offering different benefits in terms of torque, efficiency, and compactness.

4. Torque:

   • High Torque: Due to the gear reduction, the motor can provide high torque at low speeds. This is essential for applications that require significant mechanical force, such as robotics and conveyor systems.

5. Motor Type:

   • Brushed DC Motor: Most commonly used in such setups. It has brushes and a commutator that handle the switching of current in the motor windings.
   • Brushless DC Motor: Less common for geared motors but provides higher efficiency and longer life with electronic commutation.

6. Construction:

   • Stator: The stationary part of the motor that creates the magnetic field.
   • Rotor: The rotating part that turns due to the interaction with the magnetic field.
   • Commutator and Brushes (for Brushed Motors): Used to switch the current direction in the rotor windings.

7. Applications:

   • Robotics: For precise movements and control of mechanical parts.
   • Automated Systems: Such as conveyor belts and actuators where controlled, slow motion is required.
   • Model Vehicles: For slow-moving parts or steering mechanisms.
   • Consumer Appliances: In devices requiring controlled and consistent movement.

Technical Specifications:

Typical specifications for a 100 RPM straight DC geared motor might include:

• Voltage: 12V DC (can vary)
• Output Speed: 100 RPM (at rated voltage)
• No-Load Speed: Higher RPM before gear reduction (depends on motor design)
• Stall Torque: Varies depending on the motor and gearbox; often specified in units like Nm (Newton-meters) or oz-in (ounce-inches)
• Current Consumption: Varies with load; typically higher under stall or heavy load conditions
• Gear Ratio: The ratio of the motor's no-load speed to the output speed of 100 RPM determines the gear ratio. For instance, if the motor's no-load speed is 2000 RPM, the gear ratio would be 20:1.

Wiring and Operation:

Wiring Diagram:

1. Power Supply:

   • Positive Terminal (+): Connects to the positive terminal of the DC power supply.
   • Negative Terminal (–): Connects to the negative terminal of the DC power supply.

2. Motor Control:

   • Direct Control: For basic on/off operation, connect the motor directly to the power supply.
   • Speed Control: Can be achieved using a PWM (Pulse Width Modulation) signal if speed adjustment is needed.