Hall effect sensor for industrial motor applications

22nd May 2014

Nat Bowers

0 0

Designed for use in industrial applications ranging from position detection to motor control, the DRV5000 Hall effect sensor family expands Texas Instruments motor solutions and sensing portfolio. All devices in the family include reverse supply protection up to -22V and the ability to withstand transient voltages up to 40V.

The rugged and fully protected DRV5000 sensor products include digital latch, digital switch and analog bipolar output options for such diverse applications as brushless DC (BLDC) motor control, home security, industrial valve and damper position sensors, speed and position control loops and flow meters.

The Hall effect sensor family of chopper-stabilised devices, including digital latch, digital switch and analog bipolar output options, support 2.5-38V applications. 3-pin devices offered in two industry-standard packages are compatible with existing design architectures. The sensors can operate over a temperature range from -40 to +125°C with minimal change in magnetic sensitivity over temperature.

In addition to the Hall effect sensor family, TI has introduced two reference designs in the TI Designs library to simplify and speed motor drive board design. Both designs feature the DRV5013 Hall effect sensor, the DRV8307 or DRV8308 BLDC motor gate driver, and three CSD88537ND 60-V dual NexFET power MOSFETs, along with other required circuits, to help engineers jump-start their designs and even eliminate the microcontroller in cases where control is not required.

The 12 and 24V Brushless DC Outrunner Motor reference design supports 8.5-32V and 5.2A, and can be easily modified to support specific system requirements. Using the DRV8307 BLDC controller, gate driver and drive electronics, this 6cm motor is ready to drop in and spin.

The Speed-Controlled 24V Brushless DC Outrunner Motor reference design uses the DRV8308 BLDC controller gate driver with closed-loop speed control to maintain accurate revolutions per minute across the entire motion profile. No microcontroller or firmware is used, and the intelligent sinusoidal current drive minimises acoustic noise and torque ripple to maximise motor performance.

Keith Ogboenyiya, General Manager, Motor Driver Products, TI, commented: “This new family of Hall sensors is a great addition to TI’s broad sensor portfolio and extends our ability to provide robust solutions for motor control. As motors proliferate into more and smaller applications than ever before, we are committed to providing a complete motor solution for industrial, automotive and white goods.”

The DRV5000 family is available to sample in industry-standard SOT-23, 3-pin surface mount and TO-92S, 3-pin through hole package options. The highest sensitivity digital latch device (DRV5013) is in production now.