Overview

The AC servo system, used in machine tools, industrial robots, and a variety of other manufacturing machinery, precisely controls the rotor position, rotation direction, rotation speed, and torque of servo motors. Features such as fast calculation, the ability to generate and output multiple waveforms, and feedback control are necessary to achieve fast response to changes in load, improved stopping accuracy, and minimal vibration. Also, the AC servo system requires communication functions (industrial network support) for advanced motion control instructions, remote operation and synchronous processing.

To meet these needs, Renesas offers an extensive product lineup that includes the RZ and RX families of microprocessors and microcontrollers. The RZ/T1 is a microprocessor that is ideal for AC servo control applications, combining fast real-time processing performance with extensive peripheral functions such as multifunction motor control timer, A/D converter, encoder interface, and R-IN Engine. The RX Family, comprises a wide range of product series, and an array of analog and power devices.

System Block Diagram

AC Servo Block Diagram

Recommended Products

Microcontrollers and Microprocessors

Semiconductor Device Recommended Products Features, etc.
Control MCU RZ/T1
  • Operating frequency (MHz): 600/450/300
  • Operating voltage (V): 3.3 (I/O), 1.2 (Core)
  • On-chip memory (max.): Tightly-coupled memory 512KB + 32KB, extended RAM: 1MB
  • Tightly-coupled memory for fast real-time control
  • R-IN Engine for fast, power-efficient communication
  • Encoder interface to accommodate external FPGA functions
RX71M
  • Operating frequency (MHz): 240
  • Operating voltage (V): 3.3
  • On-chip memory (max.): 4MB Flash, 522KB RAM, 64KB Data Flash
  • High-performance RXv2 core and large memory capacity for high-precision motor control
RX63T
  • Operating frequency (MHz): 100
  • Operating voltage (V): 3.3 or 5
  • On-chip memory (max.): 512KB Flash, 32KB RAM, 32KB Data Flash
  • Multifunction timer and ADC for motor control and ASIC connection via external bus
Display MCU RX651, RX65N
  • Operating frequency (MHz): 120
  • Operating voltage (V): 3.3
  • On-chip memory (Max.): 1MB Flash, 256KB RAM
  • To provide high performance and low power consumption. To enhance connectivity and encryption functions, it is possible to be delivered in various needs.
RX113
  • Operating frequency (MHz): 32
  • Operating voltage (V): 3.3
  • On-chip memory (Max.): 512KB Flash, 64KB RAM, 8KB Data Flash
  • Ability to implement a variety of user interfaces using capacitive touch sensing and segment LCD controller

Memory

Semiconductor Device Recommended Products Features, etc.
SRAM RMLV0408E Series RMLV0416E Series
  • Memory size: 4Mb
  • Access time (Max.): 45ns
  • Standby current (Typ.): 0.4μA
  • Renesas’ original memory cell technology is more than 500 times as resistant to software errors as full CMOS memory cells, providing the high reliability for the industrial market.
RMLV0808B Series RMLV0816B Series
  • Memory size: 8Mb
  • Access time (Max.): 45ns
  • Standby current (Typ.): 0.4μA
  • Renesas’ original memory cell technology is more than 500 times as resistant to software errors as full CMOS memory cells, providing the high reliability for the industrial market.
RMLV1616A Series
  • Memory size: 16Mb
  • Access time (Max.): 55ns
  • Standby current (Typ.): 0.5μA
  • Renesas’ original memory cell technology is more than 500 times as resistant to software errors as full CMOS memory cells, providing the high reliability for the industrial market.
RMWV3216A Series
  • Memory size: 32Mb
  • Access time (Max.): 55ns
  • Standby current (Typ.): 1.0μA
  • Renesas’ original memory cell technology is more than 500 times as resistant to software errors as full CMOS memory cells, providing the high reliability for the industrial market.

Analog and Power Devices

Semiconductor Device Recommended Products Features, etc.
DC/DC RAA23015x
  • Main specifications: Input voltage range: 7V to 28V, output voltage: 0.8V to 6V, Max. output current: 3A auto PFM (light load, high efficiency) mode
  • Simplify power supply design and shortening TAT in kits with Renesas microcontrollers.
RAA23023x
  • Main specifications: Input voltage range: 4.5V to 16V, output voltage: 0.8V to 6V, Max. output current: 3A auto PFM (light load, high efficiency) mode dual ch DC/DC
  • Simplify power supply design and shortening TAT in kits with Renesas microcontrollers.
Isolation Amplifier PS8352A
PS9352A
  • Main Specifications: 1% precision, analog output, SDIP package 1% precision, digital output, SDIP package
  • Support for high temperature operation up to 110 °C
IGBT/IPM Drive Photocoupler PS9402/PS9031 PS9009/PS9905
  • Main specifications: IGBT protection circuit/2.5A output small package IPM drive/690V insolation
  • Ability to select from wide range of functions to match IGBTs used
High-speed Communication Photocoupler

Tr-output Photocoupler
PS9001
  • Main specifications: 10Mbps, compact, high voltage tolerance 690V insolation compact, high temperature tolerance
  • Compact and high voltage tolerance
PS8902/PS9924
PS2381