Inverter Technology and Propulsion Systems Quiz

The inverter reduces the AC voltage before sending power to the electric motors.

Drive motors use electric power to rotate a rotor assembly inside a stator assembly, creating motion.

Coolant circulates through the inverter and drive motors to regulate internal temperature.

Some drive motors require lubrication oil to reduce friction between moving parts in the rotor assembly.

The 301.9 MHEX and 320 HEX machines have one inverter to power both the propulsion motor and the pump motor.

The 906 CWL and 950 GC MWL machines have two inverters: one for the propulsion motor and one for the pump motor.

The R1700 XE LHD machine has one inverter that powers both the propulsion motor and the pump motor.

The propulsion motor determines the rotational speed and direction of a machine's travel.

The charger receptacle box contains safety features like fuses and relays to ensure safe voltage and current delivery when the machine is charging.

The Battery Management System (BMS) monitors the charger receptacle box, while the Battery Electronic Control Modules (ECMs) control it.

The DC charging system for battery electric machines uses a DC charger port that directly connects to an external DC power source.

The machine's electronic control system monitors the DC charger port to ensure safe and efficient charging.

Battery electric machines, except the R1700 XE LHD, have an AC charging system to recharge the batteries using an external AC power source.

The AC charging system uses an AC charger port that directly connects to an external AC power source.

Onboard chargers convert the AC voltage coming from the AC charger port into DC voltage before it reaches the Power Distribution Unit (PDU).

Fuses protect the onboard chargers by controlling the current of the AC voltage entering them.

The pump motor provides hydraulic power to the machine's systems, including the travel system on machines like the 301.9 MHEX, 320 HEX, and 906 CWL.

The pump motor is connected to a pump drive, which rotates gears to power the hydraulic pumps on machines like the 950 GC MWL and R1700 XE LHD.

A DC/DC converter transforms high voltage from the PDU (Power Distribution Unit) to lower voltages (12 VDC or 24 VDC) needed by the machine's low voltage electrical systems.

The low voltage system comprises components like lights, control panels, ECMs (electronic control modules), and other electrical and electronic elements.

The DC/DC converter has a high voltage input port that receives power from the PDU, as well as multiple low voltage output ports that supply different components within the machine.

Some DC/DC converters require coolant to maintain their optimal operating temperature. Coolant ports permit coolant to enter and exit the converter.

Battery electric machines have a DC charging system that utilizes an external DC power source to recharge their battery modules. The R1700 XE LHD, for example, has a charger receptacle box with two DC charger ports.

The DC charger ports allow the LHD to connect to a Mobile Equipment Charger (MEC) unit, enabling fast charging of the machine's batteries.

A Battery Management Unit (BMU) monitors the health and performance of a string of battery modules, ensuring safe and efficient operation.

A Master Battery Management Module (MBMM) oversees all the BMUs in both battery control compartments, providing central control and management of the entire battery system.

A Battery ECM (Battery Electronic Control Module) is dedicated to controlling specific BMUs and the MBMM in a particular battery compartment.

On the R1700 XE LHD, the Electric Drive ECM monitors and controls the inverter and DC/DC converter, playing a crucial role in managing the flow of electric energy in the system.

The Powertrain ECM oversees both the Battery ECMs and the Electric Drive ECM, providing an overarching control and management function for the entire powertrain system.

The Machine ECM on the 301.9 MHEX is responsible for monitoring and controlling various functions, including the inverter, DC/DC converter, onboard chargers, and charger ports.

For machines like the 906 CWL and 950 GC MWL, the Machine ECM oversees crucial functions such as the PDU, inverters, DC/DC converter, onboard chargers, and charger ports.

Indirect control of the pump motor and propulsion motor can be achieved by adjusting the voltage, current, and frequency of the electric power supplied by the inverter.

The Battery Management System (BMS) constantly monitors the battery modules, checking for any faults or issues.

The ECM responsible for the battery system enables the discharge of DC voltage from the battery modules to the PEM (Power Electronics Module) or HaV junction box.

The ECM responsible for the HaV electrical system checks the status of the PDU (Power Distribution Unit) and the inverter, ensuring they are functioning correctly.

An inverter converts DC electricity from the PEM or HaV junction box into AC electricity that powers the electric motor.

The electric motor uses the AC electricity to rotate a rotor assembly inside a stator assembly, ultimately producing the motion for the machine.

The ECM governing the battery electric machine systems determines the electric motor's output based on operator input and system demands.

The ECM responsible for the battery electric machine systems communicates important data to the ECMs managing the BMS and the HaV electrical system.

The PEM, or HaV junction box, receives the DC voltage from the battery modules and delivers it to the inverter.

The inverter converts the DC voltage stored in the battery into AC voltage, which is used to power the propulsion motor (for travel) and the pump motor (for hydraulic systems).

On wheel machines, the propulsion motor is connected to a gearbox, which transfers power to the axles, enabling the machine to move. The propulsion motor's speed and direction control the machine's speed and direction.

The ECM (Electronic Control Module) receives commands from the operator and controls the inverter. It sends specific commands to the inverter, adjusting the voltage, current, and frequency of the AC power delivered to the propulsion and pump motors.

Maintenance programs for battery electric machines are designed to ensure reliable operation and detect potential problems. These programs should be conducted by trained personnel and follow the instructions in the Operation and Maintenance Manual (OMM).

The data collected during walk-around inspections and Preventive Maintenance (PM) provides valuable information about the machine's health. This data can be used to schedule needed services, detect potential issues, and proactively address any problems.

The 950 GC MWL and R1700 XE LHD machines have a single propulsion motor that directly connects to the output transfer gears, which transfer power to the axles. This setup provides a direct connection between the motor and the axles, delivering power efficiently for travel.

For the 906 CWL machine, the propulsion motor is connected to a gearbox located in a dropbox, which then transfers power to the front and rear axles through a series of gears. This setup allows for more flexibility in speed and direction control, while maximizing the power delivered to the wheels.