What is the power supply and communication for electric compressors?

HV/PHEV and EV vehicles have two batteries.

(※Quantity, capacity, etc. may differ depending on the vehicle)

• HV battery: Vehicle motor drive battery
• 12V battery: Battery for low voltage equipment

Electric compressors operate by receiving power from each battery.

The main classification is

• Control circuit drive power supply, communication system = LV battery
• IGBT drive circuit = HV battery

What is the inverter circuit electronic circuit block?

	Inverter circuit block	Function/Role
①	Power circuit	A circuit that supplies the voltage necessary for the operation of each electronic component and circuit such as the
②	12V detection circuit	Circuit that monitors the voltage of
③	Communication circuit	A circuit that allows communication between the vehicle and the inverter ( microcomputer ). Receives signals from the vehicle and sends compressor information to the vehicle.
④	Microcontroller ( +peripheral circuit )	The so-called brain in humans. Exchanges information with the vehicle, obtains information on the inverter circuit, receives this information, generates appropriate motor control signals, performs protection, etc.
⑤	Sensor circuit	A circuit that detects the current flowing through the inverter, monitors the Li-ion battery (HV battery), and detects the temperature of parts.
⑥	Motor drive circuit	This circuit has a 3-phase (U, V, W) upper and lower (6 circuits used) circuit configuration that receives control signals from a microcomputer, performs switching operations for power devices, and drives a motor.
⑦	Filter/smoothing circuit	A circuit that reduces voltage fluctuations

What is the communication circuit inside the inverter circuit electronic circuit block?

Purpose

The electric compressor communicates information with the vehicle using CAN or LIN communication.

What are the types of communication circuits?

CAN

Controller Area Network (CAN) is an internationally standardized serial communication protocol by ISO .

Up until now, the automobile industry has developed various electronic control systems for automobiles in pursuit of safety, comfort, low pollution, and low cost. These control systems are often configured with multiple bus lines for each system, resulting in an increase in wiring harnesses, resulting in increased weight and cost. Therefore, with the aim of ``reducing wire harnesses'' and ``communicating large amounts of data at high speed via multiple LANs,'' German electrical equipment manufacturer BOSCH developed CAN as a communication protocol for automobile electronic control systems. Developed.

LIN

LIN is an abbreviation for Local Interconnect Network , and it is a communication standard established by the LIN consortium, which mainly consists of European automobile manufacturers and semiconductor manufacturers, with the aim of reducing the cost of in-vehicle networks.

The LIN specification has been repeatedly revised, and three types , LIN Revision 1.3 , 2.0 , and 2.1 , are mainly used for automotive ECUs , but the last revision by the LIN Consortium was LIN Revision.2.2A .

It has now been transferred to ISO , and the LIN specification was published as ISO17987 in August 2016 . LIN is positioned as a sub-bus of CAN , making it possible to construct a network at a lower cost than CAN.

Why do we need an electric compressor?

1. The compressor of the air conditioner in a fuel car uses the power of the engine to compress the refrigerant.
2. EV cars do not have an engine, so they use electric energy from batteries. Converts to motor control current using an inverter. Start the motor and compress the refrigerant in the compression area.
3. The inverter receives instructions from the vehicle and instructs the operation (rotation speed) of the compression area.
4. In conventional DC motors, these are mechanical contacts such as "brushes" and "commutators". The brushes wear out due to long-term rotation, reducing the lifespan of the motor.
5. Electric compressors do not have the mechanical contacts mentioned in no 4 above. Adopts brushless motor.
6. Brushless motors have a built-in magnetic element or optical encoder for rotor position detection. This position detector   sends a signal to the drive circuit. The motor winding is a 3- phase star connection. Additionally, the rotor uses permanent   magnets.
7. However, in order to rotate the motor, the electronic circuit (inverter) of the drive circuit, which is composed of IGBTs , is used to electrically switch the current and rotate the motor.
8. How to drive a brushless motor. (Here in after referred to as IGBTs) are connected to the motor windings, and six IGBTs make up an inverter. The upper and lower IGBTs alternately turn on and off in a fixed order to change the direction of the winding current.
9. Explain the mechanism of rotation. In the IGBT switching sequence shown below, in step 1, Tr1 and Tr6 of the IGBT are in the ON state. At this time, the winding current flows from the U phase to the W phase, and the U phase is excited to the north pole and the W phase to the south pole. This causes the rotor to rotate 30°. By repeating this action 12 times, the rotor will rotate.

In
Indonesia, Large scale of Physical restriction is still happening in order to
moving to the new normal lifestyle activities, its applied for all element of
society, including manufacturing activities.

PT.
Sanden Indonesia today, after struggling to standing on our feet after severe
pandemic condition.  We did all we can to
follow government rules and regulations to prevent the spread of COVID-19.

And
here we are today, after it was only open only for several offices activities,
on June 8, 2020 we are starting all activities with several special regulations
applied.

Human resource development activities in the form of games which can help a team to form continuity in achieving the goals and objectives made by a team / company.

This is done to increase cooperation between departments so that they can make the team solid.

As a form of PT Sanden Indonesia's dedication to the local environment, this 2019 Corporate Social Responsibility activity was carried out by distributing LED lights to Nagasari villagers.

This is in accordance with the company philosophy No. 3, namely the environment, which means that we will strive to protect the environment in all aspects of our company activities, to ensure that future generations will receive a beautiful and irreplaceable earth.