Achieve precise management of brushless DC motors in both industrial and consumer applications with TC78B016FTG and STM32L073RZ
Three-phase sine-wave PWM driver for brushless DC motors
Published Mar 26, 2024
Click board™
Brushless 10 Click
Dev Board
Nucleo-64 with STM32L073RZ MCU
Compiler
NECTO Studio
MCU
STM32L073RZ
Brushless DC motor control ideal for precise speed and direction adjustments in cooling systems, automation, and precision machinery
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Hardware Overview
How does it work?
Brushless 10 Click is based on the TC78B016FTG, a 3-phase sine-wave PWM driver for brushless DC motors from Toshiba Semiconductor. This driver is equipped with Toshiba's Intelligent Phase Control (InPAC), an advanced feature designed to automate the motor's phase adjustment. Doing so negates manual calibration, streamlines the setup process, and boosts the motor's efficiency. Primarily utilized in fan motors, this driver leverages its phase adjustment capability to enhance operational efficiency significantly. The TC78B016FTG has several control and diagnostic features to effectively manage and monitor brushless DC motors. The FGO (Rotational Speed Output) function produces a rotation pulse derived from hall sensors, offering a choice between one or three pulses per electrical angle, configurable via an FG switch or an onboard DAC if R26 is populated. This allows for a HIGH logic level (logic 1) to emit three pulses per electrical angle and a LOW logic level (logic 0) for one pulse, visually indicating the operational mode by a blue FG LED. The motor operation can be stopped using the BRK pin, where a HIGH logic state activates the Brake function, and a LOW state resumes Normal operation. Motor speed control is managed through the TSP (Rotational Speed Command) feature, which allows startup, stop, and speed adjustments based on the PWM duty output. This feature is selectable through either analog voltage or pulse duty control, achieved via the SP switch or an onboard DAC if R25 is populated. The LD pin enhances safety by detecting abnormalities such as overcurrent, thermal shutdown, motor lockout, or under/overvoltage conditions, with visual alerts provided by a red ALR LED. Additionally, the board facilitates directional control of the motor, enabling
forward or reverse rotation through the CW/CCW switch or an onboard DAC if R22 is populated, with a LOW level for forward and HIGH for setting reverse direction. The TC78B016FTG's additional functionalities are tunable via the onboard DAC43608, which interfaces with the host MCU through an I2C connection. This DAC enables the selection of its I2C address through the ADDR SEL jumper by setting it to position 0 or 1, thereby offering a layer of customization for the communication protocol. Various motor control enhancements can be implemented through this DAC, like Lead Angle Control. This feature dynamically improves motor efficiency in response to rotation speed and current variations. This control can be activated using the LA switch for Intelligent Phase Control (InPAC) or Proportion to Frequency adjustments or through an external lead angle control, adjustable via input voltage for a range of 0° to 58° when R27 is populated. Additionally, it allows for setting a minimum output duty cycle and the configuration of Motor Lockout, determining whether the lockout function is active and its duration of operation versus pause. Furthermore, the DAC enables the selection of the motor's PWM frequency, offering options of 25kHz, 50kHz, 100kHz, or 200kHz, tailoring the motor's performance to the application's needs. Another key feature of this Click board™ is the TSTEP SEL jumper, which performs the acceleration and deceleration control of the motor. This function allows the motor to gradually increase or decrease its speed at startup, with the timing of these transitions adjustable to either 0.01 or 10 seconds based on the jumper's position. Brushless 10 Click supports an external power supply from 6V to 30V through the VM terminal and allows for current
output adjustments up to 3A, thanks to the R19 and R23 current sense resistors. Based on these populated current sense resistors, which form a value of 150mΩ, the current is rated on 1.5A. This feature ensures that the board can manage various brushless DC (BLDC) motors, including those equipped with Hall sensors, like the BLDC Motor with Hall Sensor offered by MIKROE. In addition to the motor connection terminals, the board is equipped with dedicated pins to connect these additional Hall signals, enhancing the motor's precision and efficiency. Moreover, the board can fine-tune these Hall signal inputs by using optional 4k7 pull-up resistors, which can be added via jumpers on the back of the board. Depending on the user's requirements, these jumpers can be set to an ON or OFF position, offering a layer of customization for signal integrity. Furthermore, this Click board™ is pre-configured for the operational mode of Hall IC usage, with provided additional configuration of Hall U/V/W signals based on a reference voltage provided by the TC78B016FTG. This configuration is set through front-side jumpers to Vreg/2 (2.5V) or Vreg (5V) positions. De-soldering some elements on the board is mandatory in the case of Hall element use. An orange VREG LED visually indicates this reference voltage, ensuring that users can easily verify the board's status at a glance. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
Features overview
Development board
Nucleo-64 with STM32L073RZ MCU offers a cost-effective and adaptable platform for developers to explore new ideas and prototype their designs. This board harnesses the versatility of the STM32 microcontroller, enabling users to select the optimal balance of performance and power consumption for their projects. It accommodates the STM32 microcontroller in the LQFP64 package and includes essential components such as a user LED, which doubles as an ARDUINO® signal, alongside user and reset push-buttons, and a 32.768kHz crystal oscillator for precise timing operations. Designed with expansion and flexibility in mind, the Nucleo-64 board features an ARDUINO® Uno V3 expansion connector and ST morpho extension pin
headers, granting complete access to the STM32's I/Os for comprehensive project integration. Power supply options are adaptable, supporting ST-LINK USB VBUS or external power sources, ensuring adaptability in various development environments. The board also has an on-board ST-LINK debugger/programmer with USB re-enumeration capability, simplifying the programming and debugging process. Moreover, the board is designed to simplify advanced development with its external SMPS for efficient Vcore logic supply, support for USB Device full speed or USB SNK/UFP full speed, and built-in cryptographic features, enhancing both the power efficiency and security of projects. Additional connectivity is
provided through dedicated connectors for external SMPS experimentation, a USB connector for the ST-LINK, and a MIPI® debug connector, expanding the possibilities for hardware interfacing and experimentation. Developers will find extensive support through comprehensive free software libraries and examples, courtesy of the STM32Cube MCU Package. This, combined with compatibility with a wide array of Integrated Development Environments (IDEs), including IAR Embedded Workbench®, MDK-ARM, and STM32CubeIDE, ensures a smooth and efficient development experience, allowing users to fully leverage the capabilities of the Nucleo-64 board in their projects.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M0
MCU Memory (KB)
192
Silicon Vendor
STMicroelectronics
Pin count
64
RAM (Bytes)
20480
You complete me!
Accessories
Click Shield for Nucleo-64 comes equipped with two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the STM32 Nucleo-64 board with no effort. This way, Mikroe allows its users to add any functionality from our ever-growing range of Click boards™, such as WiFi, GSM, GPS, Bluetooth, ZigBee, environmental sensors, LEDs, speech recognition, motor control, movement sensors, and many more. More than 1537 Click boards™, which can be stacked and integrated, are at your disposal. The STM32 Nucleo-64 boards are based on the microcontrollers in 64-pin packages, a 32-bit MCU with an ARM Cortex M4 processor operating at 84MHz, 512Kb Flash, and 96KB SRAM, divided into two regions where the top section represents the ST-Link/V2 debugger and programmer while the bottom section of the board is an actual development board. These boards are controlled and powered conveniently through a USB connection to program and efficiently debug the Nucleo-64 board out of the box, with an additional USB cable connected to the USB mini port on the board. Most of the STM32 microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the STM32 Nucleo-64 board with our Click Shield for Nucleo-64, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
Brushless DC (BLDC) Motor with a Hall sensor represents a high-performance motor from the 42BLF motor series. This motor, wired in a star configuration, boasts a Hall Effect angle of 120°, ensuring precise and reliable performance. With a compact motor length of 47mm and a lightweight design tipping the scales at just 0.29kg, this BLDC motor is engineered to meet your needs. Operating flawlessly at a voltage rating of 24VDC and a speed range of 4000 ± 10% RPM, this motor offers consistent and dependable power. It excels in a normal operational temperature range from -20 to +50°C, maintaining efficiency with a rated current of 1.9A. Also, this product seamlessly integrates with all Brushless Click boards™ and those that require BLDC motors with Hall sensors.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo-64 with STM32L073RZ MCU as your development board.
Track your results in real time
Application Output via Debug Mode
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for Brushless 10 Click driver.
Key functions:
brushless10_set_duty_cycle- This function sets the PWM duty cycle in percentages ( Range[ 0..1 ] )brushless10_pull_brake- This function pulls brake by setting the BRAKE pin to high logic statebrushless10_release_brake- This function releases brake by setting the BRAKE pin to low logic state
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief Brushless 10 Click example
*
* # Description
* This example demonstrates the use of the Brushless 10 click board by driving the
* motor at different speeds.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the click default configuration.
*
* ## Application Task
* Controls the motor speed by changing the PWM duty cycle every 2 seconds.
* The duty cycle ranges from 20% to 100%. Each step will be logged on the USB UART
* where you can track the program flow.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "brushless10.h"
static brushless10_t brushless10;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
brushless10_cfg_t brushless10_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
brushless10_cfg_setup( &brushless10_cfg );
BRUSHLESS10_MAP_MIKROBUS( brushless10_cfg, MIKROBUS_1 );
if ( BRUSHLESS10_OK != brushless10_init( &brushless10, &brushless10_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BRUSHLESS10_OK != brushless10_default_cfg ( &brushless10 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
static int8_t duty_cnt = 2;
static int8_t duty_inc = 1;
float duty = duty_cnt / 10.0;
brushless10_set_duty_cycle ( &brushless10, duty );
log_printf( &logger, "> Duty: %d%%\r\n", ( uint16_t )( duty_cnt * 10 ) );
Delay_ms( 2000 );
duty_cnt += duty_inc;
if ( duty_cnt > 10 )
{
duty_cnt = 9;
duty_inc = -1;
}
else if ( duty_cnt < 2 )
{
duty_cnt = 2;
duty_inc = 1;
log_printf( &logger, " Pull brake\r\n" );
brushless10_pull_brake ( &brushless10 );
Delay_ms( 3000 );
log_printf( &logger, " Release brake\r\n" );
brushless10_release_brake ( &brushless10 );
Delay_ms( 1000 );
}
}
int main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END
