Precision Motor Control Solution

Application

Description

Complete motor control solution using 3peak's motor drivers, op-amps, and ADCs for precise speed and position control in robotics and automation applications.

Core Advantages

Complete motor control from 3peak - seamless integration
Dual H-bridge supports two motors or one stepper
Precision current sensing for torque control
Position feedback capability with ADC
Battery-optimized with low standby current

Recommended Bill of Materials (BOM)

Item Part Number Description Quantity Datasheet
1 TPM8837 Dual H-bridge motor driver 1 📄 Download
2 TP1561 Precision op-amp for current sensing 1-2 📄 Download
3 TPC1210 12-bit ADC for position feedback 1 📄 Download
4 MCU Microcontroller for control algorithm 1 📄 Download
5 Passives Resistors, capacitors for sensing and filtering 15-20 📄 Download

Applications

Robotics platforms
Automated guided vehicles
Precision positioning systems
CNC machines
3D printers
Automated test equipment

Technical Specifications

Motor Current
1.5A continuous per channel
Supply Voltage
2.7V to 15V
P W M Frequency
Up to 100kHz
Current Sense Resolution
12-bit
Position Feedback
12-bit ADC
Protection
OCP, TSD, UVLO

Customer Success Stories

Robotics Startup

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Challenge

Needed cost-effective motor control for educational robot platform

Solution

Implemented TPM8837 with TP1561 current sensing and TPC1210 position feedback

Results

  • 35% cost reduction
  • Precise speed control achieved
  • Position feedback integrated
  • 8-hour battery life

Factory Automation Manufacturer

|

Challenge

Reliable motor control for conveyor positioning system

Solution

Deployed 3peak motor control solution with encoder feedback

Results

  • Zero field failures
  • ±0.5mm positioning accuracy
  • 30% cost savings
  • Reduced maintenance

FAE Expert Insights

S

Senior FAE

Applications Engineer

10+ years

Professional Insights

This motor control solution provides a complete platform for robotics and automation applications. The combination of motor driver, current sensing, and position feedback enables precise control at a competitive price point. Key considerations: Optimized for target applications with proven reliability; Integrated design reduces BOM cost and complexity; Comprehensive technical support from FAE team; Scalable architecture supports various configurations; Complete reference design accelerates time-to-market. Common pitfalls to avoid: Inadequate current sensing resolution; Insufficient PWM frequency causing audible noise; Poor thermal design for continuous operation; Missing protection for stall conditions.

Key Takeaways

  • Optimized for target applications with proven reliability
  • Integrated design reduces BOM cost and complexity
  • Comprehensive technical support from FAE team
  • Scalable architecture supports various configurations
  • Complete reference design accelerates time-to-market

Decision Framework

Solution Selection Decision Framework
Steps:
  1. Evaluate application requirements and performance metrics
  2. Compare solution advantages considering cost and supply chain
  3. Reference success cases and customer feedback
  4. Consult FAE for professional recommendations

Ready to Implement This Solution?

Contact our FAE team for design support and quotes

Contact Us Now

Frequently Asked Questions

What control algorithms are supported?

The solution supports various control algorithms implemented in the MCU: Open-loop speed control using PWM duty cycle, Closed-loop speed control with encoder feedback, Current-limited torque control using TP1561 sensing, Position control with PID algorithm, Trajectory generation for smooth motion profiles. The TPC1210 ADC provides feedback for closed-loop algorithms. Sample code for basic PID control is available from BeiLuo FAE team.

Start with open-loop control. Add closed-loop feedback for precision applications. Contact FAE for sample code.

How do I implement current sensing?

Current sensing uses a shunt resistor and TP1561 amplifier: Place low-value shunt resistor (0.1-0.5Ω) in series with motor ground path, Amplify shunt voltage with TP1561 (gain of 10-50), Feed amplified signal to TPC1210 ADC for digitization, Calculate current: I = Vshunt / Rshunt. For 0.1Ω shunt and 1.5A current: Vshunt = 150mV. With TP1561 gain of 10: Vadc = 1.5V. This provides good resolution while minimizing power loss in shunt.

Use 0.1-0.5Ω shunt with TP1561 amplification. Optimize for resolution vs power loss trade-off.

What position feedback options are available?

The solution supports multiple position feedback methods: Quadrature encoders (using two channels for direction), Potentometers (analog voltage proportional to position), Hall effect sensors (for BLDC commutation), Limit switches (for homing and end-of-travel). The TPC1210 12-bit ADC provides sufficient resolution for most applications. For higher resolution, consider TPC1610 16-bit ADC. Encoder interface requires external quadrature decoder or MCU capture inputs.

Use encoders for precision, potentiometers for cost-sensitive apps. TPC1210 sufficient for most position sensing.

How do I optimize for battery operation?

Battery optimization strategies: Use low PWM frequency (20kHz) to reduce switching losses, Implement sleep mode when motors are idle - TPM8837 standby current is only 1μA, Use TP1561 low-power mode for current sensing, Reduce ADC sample rate when position updates are not critical, Consider using TPC1210 power-down mode between conversions. With these techniques, standby power can be reduced to under 10μA, extending battery life significantly in intermittent duty applications.

Use sleep modes and reduce PWM frequency. Optimize ADC sample rate for battery life vs performance trade-off.

What is the maximum update rate for control loops?

Control loop update rate depends on several factors: PWM frequency: Up to 100kHz (typically 20-50kHz used), ADC conversion time: 1μs for TPC1210, Current sensing bandwidth: Limited by TP1561 (2.5MHz), MCU processing: Depends on algorithm complexity. Typical achievable rates: Current control loop: 10-20kHz, Speed control loop: 1-5kHz, Position control loop: 100Hz-1kHz. Higher rates provide better control but require more MCU processing power. Start with conservative rates and increase as needed.

Use 10kHz for current, 1kHz for speed, 100Hz for position control. Adjust based on application requirements.