Very integrated controller for various types of moto
Different applications - different controllers
The auxiliary and servo systems on board the vehicle are being separated from the propulsion system and operate with their own electric motor for reasons of efficiency and protection of the environment (reduction of CO2 emissions). In addition, an increasing number of safety and comfort functions are suitable for an electric controller. The various engine types offer particular advantages depending on their use. Next, they are explained briefly:
As a result, hardware implementation and determination of control variables are more complex than with a comparable DC motor. In the long term, the advantages of the BLDC motor, such as minimum wear and, consequently, longer life, and smaller format and weight with greater efficiency, will prevail in the market and, over time, lead the DC motor using a high quality oscilloscope to applications of niche.
The Micronas HVC4223F is a monochip solution for all the above mentioned motors with low output power, namely total fly-back currents of 1 A. In a small QFN package (6 x 6 mm), this highly integrated module includes a 32-bit CPU core (ARM® Cortex®-M3), a microcontroller with 32 kbyte flash memory, 2 kbyte SRAM, a low-dropout (LDO) voltage regulator to connect the device to a battery 12 V, a LIN-2.x transceiver, watchdog timers and output transistors to connect the device to all the mentioned motors. Thanks to this high level of integration, minimum space is required for the electronics and, consequently, the device is ideal for direct installation in the motor. The compute capacity of the CPU core supports complex motor management algorithms, such as field-oriented control of BLDC motors with spatial vector modulation (SVC), block switching (six-step modulation) with sensor coupling or sensorless control and various configurations to manage stepper motors. Thanks to the additional pin, the integrated LIN transceiver is compatible with auto-addressing, also known as Micronas easyLin®.
The possibility of automatically identifying several homogeneous applications with the help of HVC4223F facilitates the creation of LIN clusters, which are composed of numerous identical LIN nodes that are connected to the same LIN bus, with the only difference of their LIN addresses. In summary, the HVC4223F supports the migration of traditional DC motors to BLDC stateof-the-art models. In many projects, improvements in flexibility and performance translate into the use of intelligent actuators that reduce CO2 emissions and improve comfort.
Performance level
The integrated output transistors are connected to three half bridges or two 6-pulse bridges. This, together with the corresponding PWM timer, translates into a great flexibility that guarantees the connection and operation of several types of motor. Therefore, the HVC4223F can perform in the following motor configurations: independent operation of two or three DC motors, operation of a BLDC or PMSM motor or operation with a bipolar stepper motor.
conclusion
Anyone looking for a universal motor driver for low drive capacities of up to 25 W should take a look at the HVC4223F. The standard CPU core and flexible peripherals allow you to benefit from a monochip solution when managing the control systems in a motor vehicle. The HVC4223F facilitates a gradual migration of traditional DC motors to BLDC stateof-the-art models. In many areas of application, this combination of flexibility and high performance encourages the arrival of intelligent actuators that reduce CO2 emissions and improve comfort.
The auxiliary and servo systems on board the vehicle are being separated from the propulsion system and operate with their own electric motor for reasons of efficiency and protection of the environment (reduction of CO2 emissions). In addition, an increasing number of safety and comfort functions are suitable for an electric controller. The various engine types offer particular advantages depending on their use. Next, they are explained briefly:
- The brush-type DC motors are easy to control and provide a torque that is proportional to the armature current if the stator field is constant. In other words: the armature current can be used to quickly deduce the load torque. Simultaneously, the speed is practically proportional to the armature tension. Due to these simple principles: DC motors are easy to manage and regulate. A transistor controlled by PWM as a power output phase is sufficient for a unidirectional operation, while a half bridge is ideal for right / left rotation.
- The BLDC motors (brushless) offer greater durability (useful life) and the switching is done electromechanically, since there are no brushes or collector to wear or replace. Therefore, they are ideal for use in pumps, fans and other devices that usually operate with higher service cycles. A rotating field is generated in the stator coils of the BLDC motor which, together with the permanent magnets in the rotor, causes a pair of forces. The management is more complex than with standard DC motors because the controller must create several alternate voltages (usually three) whose frequency and voltage can be adjusted and must always be correctly in phase. Sinusoidal phase currents are required to ensure that the BLDC motor rotates silently and smoothly. This is achieved, for example,
As a result, hardware implementation and determination of control variables are more complex than with a comparable DC motor. In the long term, the advantages of the BLDC motor, such as minimum wear and, consequently, longer life, and smaller format and weight with greater efficiency, will prevail in the market and, over time, lead the DC motor using a high quality oscilloscope to applications of niche.
- Step motors are synchronous machines with, at least, two phases that are controlled by PWM through half-bridges. The number of poles is high, which implies that each rotor revolution can be divided into a discrete number of steps. The rotor angle and the position of the load can be determined through a step-by-step rotation with the help of a reference point. Possible fields of application in a vehicle are found, for example, in headlamp self-leveling systems, adaptive headlamp actuators and various flap control units. Two half-bridges are needed for bipolar control of a two-phase step motor.
The Micronas HVC4223F is a monochip solution for all the above mentioned motors with low output power, namely total fly-back currents of 1 A. In a small QFN package (6 x 6 mm), this highly integrated module includes a 32-bit CPU core (ARM® Cortex®-M3), a microcontroller with 32 kbyte flash memory, 2 kbyte SRAM, a low-dropout (LDO) voltage regulator to connect the device to a battery 12 V, a LIN-2.x transceiver, watchdog timers and output transistors to connect the device to all the mentioned motors. Thanks to this high level of integration, minimum space is required for the electronics and, consequently, the device is ideal for direct installation in the motor. The compute capacity of the CPU core supports complex motor management algorithms, such as field-oriented control of BLDC motors with spatial vector modulation (SVC), block switching (six-step modulation) with sensor coupling or sensorless control and various configurations to manage stepper motors. Thanks to the additional pin, the integrated LIN transceiver is compatible with auto-addressing, also known as Micronas easyLin®.
The possibility of automatically identifying several homogeneous applications with the help of HVC4223F facilitates the creation of LIN clusters, which are composed of numerous identical LIN nodes that are connected to the same LIN bus, with the only difference of their LIN addresses. In summary, the HVC4223F supports the migration of traditional DC motors to BLDC stateof-the-art models. In many projects, improvements in flexibility and performance translate into the use of intelligent actuators that reduce CO2 emissions and improve comfort.
Performance level
The integrated output transistors are connected to three half bridges or two 6-pulse bridges. This, together with the corresponding PWM timer, translates into a great flexibility that guarantees the connection and operation of several types of motor. Therefore, the HVC4223F can perform in the following motor configurations: independent operation of two or three DC motors, operation of a BLDC or PMSM motor or operation with a bipolar stepper motor.
conclusion
Anyone looking for a universal motor driver for low drive capacities of up to 25 W should take a look at the HVC4223F. The standard CPU core and flexible peripherals allow you to benefit from a monochip solution when managing the control systems in a motor vehicle. The HVC4223F facilitates a gradual migration of traditional DC motors to BLDC stateof-the-art models. In many areas of application, this combination of flexibility and high performance encourages the arrival of intelligent actuators that reduce CO2 emissions and improve comfort.