AC Drive

Overview

AC Drive is a variable-speed controller that precisely controls the shaft rotation speed, typically, an induction motor or synchronous motor. They are widely used in industrial machinery such as production line conveyors, cranes, elevators, fans, pumps, and compressors. As the need to save energy grows worldwide, there is widespread demand for an inverter control to boost energy efficiency. The performance and multifunctionality of inverters continue to improve. This is due to advances in simple controller functions, interfaces such as field networks of various types and USB, and display panels enhancing usability. At the same time, there is growing demand in emerging economies for inverters that are cheaper and more compact.

In response to these varied requirements, Renesas offers a broad lineup of products that provide scalability. The RX Family provide an array of on-chip peripheral functions such as multifunction timers and A/D converters optimized for inverter control, Ethernet and USB interfaces, and serial interfaces. Also available with analog and power devices suitable for inverter applications.

System Block Diagram

AC Drive Block Diagram

Microcontrollers and Microprocessors

Semiconductor Device	Recommended Products	Features, etc.
Control MCU	RX71M	Operating frequency (MHz): 240 Operating voltage (V): 3.3 On-chip memory (Max.): 4MB Flash, 552KB RAM, 64KB Data Flash High performance RXv2 core and large memory for high precision motor control
	RX63T	Operating frequency (MHz): 100 Operating voltage (V): 3.3 or 5 On-chip memory (Max.): 512KB Flash, 48KB RAM, 32KB Data Flash Multifunctional timers and ADCs for precise motor control External bus for interfacing with ASICs
	RX24T RX24U	Operating frequency (MHz): 80 Operating voltage (V): 2.7 to 5.5 On-chip memory (Max.): 512KB Flash, 32KB RAM, 8KB Data Flash Compact form factor with necessary features to control motors of various supply voltages
Display/Option MCU	RX65N, RX651	Operating frequency (MHz): 120 Operating voltage (V): 3.3 On-chip memory (Max.): 1MB Flash, 256KB RAM High performance and low power consumption Enhanced connectivity and encryption feature to meet various needs
Display/Option MCU	RX113	Operating frequency (MHz): 32 Operating voltage (V): 3.3 On-chip memory (Max.): 512KB Flash, 64KB RAM, 8KB Data Flash Suitable for various user interfaces such as LCD, touch sensor, USB etc.

Industrial Communication Chip

Semiconductor Device	Recommended Products	Features, etc.
Industrial Communication Controller Multi-protocol	R-IN32M3-CL/EC	Support CC-Link IE, EtherCAT, EtherNet/IP etc. with one chip
	R-IN32M4-CL2	Support CC-Link IE field (intelligent device) Two Gigabit ports with built-in PHY
	RZ/N1L	Easy slave implementation with R-IN Engine and specific hardware
Industrial Communication Controller Dedicated Protocol	TPS-1	Best real-time performance, fully meets PROFINET IRT standards
Industrial Communication Controller Dedicated Protocol	EC-1	Optimized for EtherCAT applications Provide solutions with high reliability

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