This powershell script is able to invoke another powershell script every 90 seconds & pipe the output to a file

InvokePowershellAndSleep.ps1

# This function generates a new filename based on the current datetime
function GenerateFileNamePerHour
{
    # Store the current date in a variable
    $cDate = Get-Date
    $val = ("{0}_{1}_{2}-{3}00HRS.log" -f $cDate.Day, $cDate.Month, $cDate.Year, $cDate.Hour)
    return $val
}

# This script will run till the 328th day of the year 
while((Get-Date).DayOfYear -le 328)
{
    .\YourScript.ps1 | Out-File "$(GenerateFileNamePerHour)" -Append

    # Script continues every 90 seconds
    Start-Sleep -seconds 90
}